20216960

素因数分解:

$2^7\times 5^1\times {\mathrm{31}}^1\times {\mathrm{1019}}^1$

素因数の和:1069

約数の個数: 64

約数和(自身を含む): 49939200

約数和(自身を除く): 29722240

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, 1019, 1240, 1984, 2038, 2480, 3968, 4076, 4960, 5095, 8152, 9920, 10190, 16304, 19840, 20380, 31589, 32608, 40760, 63178, 65216, 81520, 126356, 130432, 157945, 163040, 252712, 315890, 326080, 505424, 631780, 652160, 1010848, 1263560, 2021696, 2527120, 4043392, 5054240, 10108480, 20216960]

約数ペア:

[(1, 20216960), (2, 10108480), (4, 5054240), (5, 4043392), (8, 2527120), (10, 2021696), (16, 1263560), (20, 1010848), (31, 652160), (32, 631780), (40, 505424), (62, 326080), (64, 315890), (80, 252712), (124, 163040), (128, 157945), (155, 130432), (160, 126356), (248, 81520), (310, 65216), (320, 63178), (496, 40760), (620, 32608), (640, 31589), (992, 20380), (1019, 19840), (1240, 16304), (1984, 10190), (2038, 9920), (2480, 8152), (3968, 5095), (4076, 4960)]