20921460

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{457}}^1$

素因数の和:585

約数の個数: 96

約数和(自身を含む): 67710720

約数和(自身を除く): 46789260

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 109, 140, 210, 218, 327, 420, 436, 457, 545, 654, 763, 914, 1090, 1308, 1371, 1526, 1635, 1828, 2180, 2285, 2289, 2742, 3052, 3199, 3270, 3815, 4570, 4578, 5484, 6398, 6540, 6855, 7630, 9140, 9156, 9597, 11445, 12796, 13710, 15260, 15995, 19194, 22890, 27420, 31990, 38388, 45780, 47985, 49813, 63980, 95970, 99626, 149439, 191940, 199252, 249065, 298878, 348691, 498130, 597756, 697382, 747195, 996260, 1046073, 1394764, 1494390, 1743455, 2092146, 2988780, 3486910, 4184292, 5230365, 6973820, 10460730, 20921460]

約数ペア:

[(1, 20921460), (2, 10460730), (3, 6973820), (4, 5230365), (5, 4184292), (6, 3486910), (7, 2988780), (10, 2092146), (12, 1743455), (14, 1494390), (15, 1394764), (20, 1046073), (21, 996260), (28, 747195), (30, 697382), (35, 597756), (42, 498130), (60, 348691), (70, 298878), (84, 249065), (105, 199252), (109, 191940), (140, 149439), (210, 99626), (218, 95970), (327, 63980), (420, 49813), (436, 47985), (457, 45780), (545, 38388), (654, 31990), (763, 27420), (914, 22890), (1090, 19194), (1308, 15995), (1371, 15260), (1526, 13710), (1635, 12796), (1828, 11445), (2180, 9597), (2285, 9156), (2289, 9140), (2742, 7630), (3052, 6855), (3199, 6540), (3270, 6398), (3815, 5484), (4570, 4578)]