21700840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{97}}^1$

素因数の和:179

約数の個数: 128

約数和(自身を含む): 60963840

約数和(自身を除く): 39263000

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 17, 20, 28, 34, 35, 40, 47, 56, 68, 70, 85, 94, 97, 119, 136, 140, 170, 188, 194, 235, 238, 280, 329, 340, 376, 388, 470, 476, 485, 595, 658, 679, 680, 776, 799, 940, 952, 970, 1190, 1316, 1358, 1598, 1645, 1649, 1880, 1940, 2380, 2632, 2716, 3196, 3290, 3298, 3395, 3880, 3995, 4559, 4760, 5432, 5593, 6392, 6580, 6596, 6790, 7990, 8245, 9118, 11186, 11543, 13160, 13192, 13580, 15980, 16490, 18236, 22372, 22795, 23086, 27160, 27965, 31913, 31960, 32980, 36472, 44744, 45590, 46172, 55930, 57715, 63826, 65960, 77503, 91180, 92344, 111860, 115430, 127652, 155006, 159565, 182360, 223720, 230860, 255304, 310012, 319130, 387515, 461720, 542521, 620024, 638260, 775030, 1085042, 1276520, 1550060, 2170084, 2712605, 3100120, 4340168, 5425210, 10850420, 21700840]

約数ペア:

[(1, 21700840), (2, 10850420), (4, 5425210), (5, 4340168), (7, 3100120), (8, 2712605), (10, 2170084), (14, 1550060), (17, 1276520), (20, 1085042), (28, 775030), (34, 638260), (35, 620024), (40, 542521), (47, 461720), (56, 387515), (68, 319130), (70, 310012), (85, 255304), (94, 230860), (97, 223720), (119, 182360), (136, 159565), (140, 155006), (170, 127652), (188, 115430), (194, 111860), (235, 92344), (238, 91180), (280, 77503), (329, 65960), (340, 63826), (376, 57715), (388, 55930), (470, 46172), (476, 45590), (485, 44744), (595, 36472), (658, 32980), (679, 31960), (680, 31913), (776, 27965), (799, 27160), (940, 23086), (952, 22795), (970, 22372), (1190, 18236), (1316, 16490), (1358, 15980), (1598, 13580), (1645, 13192), (1649, 13160), (1880, 11543), (1940, 11186), (2380, 9118), (2632, 8245), (2716, 7990), (3196, 6790), (3290, 6596), (3298, 6580), (3395, 6392), (3880, 5593), (3995, 5432), (4559, 4760)]