81913240

素因数分解:

$2^3\times 5^1\times {\mathrm{59}}^1\times {\mathrm{61}}^1\times {\mathrm{569}}^1$

素因数の和:700

約数の個数: 64

約数和(自身を含む): 190836000

約数和(自身を除く): 108922760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 59, 61, 118, 122, 236, 244, 295, 305, 472, 488, 569, 590, 610, 1138, 1180, 1220, 2276, 2360, 2440, 2845, 3599, 4552, 5690, 7198, 11380, 14396, 17995, 22760, 28792, 33571, 34709, 35990, 67142, 69418, 71980, 134284, 138836, 143960, 167855, 173545, 268568, 277672, 335710, 347090, 671420, 694180, 1342840, 1388360, 2047831, 4095662, 8191324, 10239155, 16382648, 20478310, 40956620, 81913240]

約数ペア:

[(1, 81913240), (2, 40956620), (4, 20478310), (5, 16382648), (8, 10239155), (10, 8191324), (20, 4095662), (40, 2047831), (59, 1388360), (61, 1342840), (118, 694180), (122, 671420), (236, 347090), (244, 335710), (295, 277672), (305, 268568), (472, 173545), (488, 167855), (569, 143960), (590, 138836), (610, 134284), (1138, 71980), (1180, 69418), (1220, 67142), (2276, 35990), (2360, 34709), (2440, 33571), (2845, 28792), (3599, 22760), (4552, 17995), (5690, 14396), (7198, 11380)]