20097920

素因数分解:

$2^7\times 5^1\times {\mathrm{31}}^1\times {\mathrm{1013}}^1$

素因数の和:1063

約数の個数: 64

約数和(自身を含む): 49645440

約数和(自身を除く): 29547520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 310, 320, 496, 620, 640, 992, 1013, 1240, 1984, 2026, 2480, 3968, 4052, 4960, 5065, 8104, 9920, 10130, 16208, 19840, 20260, 31403, 32416, 40520, 62806, 64832, 81040, 125612, 129664, 157015, 162080, 251224, 314030, 324160, 502448, 628060, 648320, 1004896, 1256120, 2009792, 2512240, 4019584, 5024480, 10048960, 20097920]

約数ペア:

[(1, 20097920), (2, 10048960), (4, 5024480), (5, 4019584), (8, 2512240), (10, 2009792), (16, 1256120), (20, 1004896), (31, 648320), (32, 628060), (40, 502448), (62, 324160), (64, 314030), (80, 251224), (124, 162080), (128, 157015), (155, 129664), (160, 125612), (248, 81040), (310, 64832), (320, 62806), (496, 40520), (620, 32416), (640, 31403), (992, 20260), (1013, 19840), (1240, 16208), (1984, 10130), (2026, 9920), (2480, 8104), (3968, 5065), (4052, 4960)]