20798480

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{373}}^1$

素因数の和:444

約数の個数: 80

約数和(自身を含む): 52590384

約数和(自身を除く): 31791904

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 41, 68, 80, 82, 85, 136, 164, 170, 205, 272, 328, 340, 373, 410, 656, 680, 697, 746, 820, 1360, 1394, 1492, 1640, 1865, 2788, 2984, 3280, 3485, 3730, 5576, 5968, 6341, 6970, 7460, 11152, 12682, 13940, 14920, 15293, 25364, 27880, 29840, 30586, 31705, 50728, 55760, 61172, 63410, 76465, 101456, 122344, 126820, 152930, 244688, 253640, 259981, 305860, 507280, 519962, 611720, 1039924, 1223440, 1299905, 2079848, 2599810, 4159696, 5199620, 10399240, 20798480]

約数ペア:

[(1, 20798480), (2, 10399240), (4, 5199620), (5, 4159696), (8, 2599810), (10, 2079848), (16, 1299905), (17, 1223440), (20, 1039924), (34, 611720), (40, 519962), (41, 507280), (68, 305860), (80, 259981), (82, 253640), (85, 244688), (136, 152930), (164, 126820), (170, 122344), (205, 101456), (272, 76465), (328, 63410), (340, 61172), (373, 55760), (410, 50728), (656, 31705), (680, 30586), (697, 29840), (746, 27880), (820, 25364), (1360, 15293), (1394, 14920), (1492, 13940), (1640, 12682), (1865, 11152), (2788, 7460), (2984, 6970), (3280, 6341), (3485, 5968), (3730, 5576)]