21400680

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{349}}^1$

素因数の和:443

約数の個数: 128

約数和(自身を含む): 74592000

約数和(自身を除く): 53191320

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 73, 84, 105, 120, 140, 146, 168, 210, 219, 280, 292, 349, 365, 420, 438, 511, 584, 698, 730, 840, 876, 1022, 1047, 1095, 1396, 1460, 1533, 1745, 1752, 2044, 2094, 2190, 2443, 2555, 2792, 2920, 3066, 3490, 4088, 4188, 4380, 4886, 5110, 5235, 6132, 6980, 7329, 7665, 8376, 8760, 9772, 10220, 10470, 12215, 12264, 13960, 14658, 15330, 19544, 20440, 20940, 24430, 25477, 29316, 30660, 36645, 41880, 48860, 50954, 58632, 61320, 73290, 76431, 97720, 101908, 127385, 146580, 152862, 178339, 203816, 254770, 293160, 305724, 356678, 382155, 509540, 535017, 611448, 713356, 764310, 891695, 1019080, 1070034, 1426712, 1528620, 1783390, 2140068, 2675085, 3057240, 3566780, 4280136, 5350170, 7133560, 10700340, 21400680]

約数ペア:

[(1, 21400680), (2, 10700340), (3, 7133560), (4, 5350170), (5, 4280136), (6, 3566780), (7, 3057240), (8, 2675085), (10, 2140068), (12, 1783390), (14, 1528620), (15, 1426712), (20, 1070034), (21, 1019080), (24, 891695), (28, 764310), (30, 713356), (35, 611448), (40, 535017), (42, 509540), (56, 382155), (60, 356678), (70, 305724), (73, 293160), (84, 254770), (105, 203816), (120, 178339), (140, 152862), (146, 146580), (168, 127385), (210, 101908), (219, 97720), (280, 76431), (292, 73290), (349, 61320), (365, 58632), (420, 50954), (438, 48860), (511, 41880), (584, 36645), (698, 30660), (730, 29316), (840, 25477), (876, 24430), (1022, 20940), (1047, 20440), (1095, 19544), (1396, 15330), (1460, 14658), (1533, 13960), (1745, 12264), (1752, 12215), (2044, 10470), (2094, 10220), (2190, 9772), (2443, 8760), (2555, 8376), (2792, 7665), (2920, 7329), (3066, 6980), (3490, 6132), (4088, 5235), (4188, 5110), (4380, 4886)]