20315776

素因数分解:

$2^7\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{421}}^1$

素因数の和:477

約数の個数: 64

約数和(自身を含む): 45196200

約数和(自身を除く): 24880424

約数列:

[1, 2, 4, 8, 13, 16, 26, 29, 32, 52, 58, 64, 104, 116, 128, 208, 232, 377, 416, 421, 464, 754, 832, 842, 928, 1508, 1664, 1684, 1856, 3016, 3368, 3712, 5473, 6032, 6736, 10946, 12064, 12209, 13472, 21892, 24128, 24418, 26944, 43784, 48256, 48836, 53888, 87568, 97672, 158717, 175136, 195344, 317434, 350272, 390688, 634868, 700544, 781376, 1269736, 1562752, 2539472, 5078944, 10157888, 20315776]

約数ペア:

[(1, 20315776), (2, 10157888), (4, 5078944), (8, 2539472), (13, 1562752), (16, 1269736), (26, 781376), (29, 700544), (32, 634868), (52, 390688), (58, 350272), (64, 317434), (104, 195344), (116, 175136), (128, 158717), (208, 97672), (232, 87568), (377, 53888), (416, 48836), (421, 48256), (464, 43784), (754, 26944), (832, 24418), (842, 24128), (928, 21892), (1508, 13472), (1664, 12209), (1684, 12064), (1856, 10946), (3016, 6736), (3368, 6032), (3712, 5473)]