21497280

素因数分解:

$2^6\times 3^1\times 5^1\times 7^2\times {\mathrm{457}}^1$

素因数の和:491

約数の個数: 168

約数和(自身を含む): 79571088

約数和(自身を除く): 58073808

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 32, 35, 40, 42, 48, 49, 56, 60, 64, 70, 80, 84, 96, 98, 105, 112, 120, 140, 147, 160, 168, 192, 196, 210, 224, 240, 245, 280, 294, 320, 336, 392, 420, 448, 457, 480, 490, 560, 588, 672, 735, 784, 840, 914, 960, 980, 1120, 1176, 1344, 1371, 1470, 1568, 1680, 1828, 1960, 2240, 2285, 2352, 2742, 2940, 3136, 3199, 3360, 3656, 3920, 4570, 4704, 5484, 5880, 6398, 6720, 6855, 7312, 7840, 9140, 9408, 9597, 10968, 11760, 12796, 13710, 14624, 15680, 15995, 18280, 19194, 21936, 22393, 23520, 25592, 27420, 29248, 31990, 36560, 38388, 43872, 44786, 47040, 47985, 51184, 54840, 63980, 67179, 73120, 76776, 87744, 89572, 95970, 102368, 109680, 111965, 127960, 134358, 146240, 153552, 179144, 191940, 204736, 219360, 223930, 255920, 268716, 307104, 335895, 358288, 383880, 438720, 447860, 511840, 537432, 614208, 671790, 716576, 767760, 895720, 1023680, 1074864, 1343580, 1433152, 1535520, 1791440, 2149728, 2687160, 3071040, 3582880, 4299456, 5374320, 7165760, 10748640, 21497280]

約数ペア:

[(1, 21497280), (2, 10748640), (3, 7165760), (4, 5374320), (5, 4299456), (6, 3582880), (7, 3071040), (8, 2687160), (10, 2149728), (12, 1791440), (14, 1535520), (15, 1433152), (16, 1343580), (20, 1074864), (21, 1023680), (24, 895720), (28, 767760), (30, 716576), (32, 671790), (35, 614208), (40, 537432), (42, 511840), (48, 447860), (49, 438720), (56, 383880), (60, 358288), (64, 335895), (70, 307104), (80, 268716), (84, 255920), (96, 223930), (98, 219360), (105, 204736), (112, 191940), (120, 179144), (140, 153552), (147, 146240), (160, 134358), (168, 127960), (192, 111965), (196, 109680), (210, 102368), (224, 95970), (240, 89572), (245, 87744), (280, 76776), (294, 73120), (320, 67179), (336, 63980), (392, 54840), (420, 51184), (448, 47985), (457, 47040), (480, 44786), (490, 43872), (560, 38388), (588, 36560), (672, 31990), (735, 29248), (784, 27420), (840, 25592), (914, 23520), (960, 22393), (980, 21936), (1120, 19194), (1176, 18280), (1344, 15995), (1371, 15680), (1470, 14624), (1568, 13710), (1680, 12796), (1828, 11760), (1960, 10968), (2240, 9597), (2285, 9408), (2352, 9140), (2742, 7840), (2940, 7312), (3136, 6855), (3199, 6720), (3360, 6398), (3656, 5880), (3920, 5484), (4570, 4704)]