20016880

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1013}}^1$

素因数の和:1058

約数の個数: 80

約数和(自身を含む): 52809120

約数和(自身を除く): 32792240

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 19, 20, 26, 38, 40, 52, 65, 76, 80, 95, 104, 130, 152, 190, 208, 247, 260, 304, 380, 494, 520, 760, 988, 1013, 1040, 1235, 1520, 1976, 2026, 2470, 3952, 4052, 4940, 5065, 8104, 9880, 10130, 13169, 16208, 19247, 19760, 20260, 26338, 38494, 40520, 52676, 65845, 76988, 81040, 96235, 105352, 131690, 153976, 192470, 210704, 250211, 263380, 307952, 384940, 500422, 526760, 769880, 1000844, 1053520, 1251055, 1539760, 2001688, 2502110, 4003376, 5004220, 10008440, 20016880]

約数ペア:

[(1, 20016880), (2, 10008440), (4, 5004220), (5, 4003376), (8, 2502110), (10, 2001688), (13, 1539760), (16, 1251055), (19, 1053520), (20, 1000844), (26, 769880), (38, 526760), (40, 500422), (52, 384940), (65, 307952), (76, 263380), (80, 250211), (95, 210704), (104, 192470), (130, 153976), (152, 131690), (190, 105352), (208, 96235), (247, 81040), (260, 76988), (304, 65845), (380, 52676), (494, 40520), (520, 38494), (760, 26338), (988, 20260), (1013, 19760), (1040, 19247), (1235, 16208), (1520, 13169), (1976, 10130), (2026, 9880), (2470, 8104), (3952, 5065), (4052, 4940)]