20565118520

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{797}}^1\times {\mathrm{20809}}^1$

素因数の和:21648

約数の個数: 64

約数和(自身を含む): 47826374400

約数和(自身を除く): 27261255880

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 797, 1240, 1594, 3188, 3985, 6376, 7970, 15940, 20809, 24707, 31880, 41618, 49414, 83236, 98828, 104045, 123535, 166472, 197656, 208090, 247070, 416180, 494140, 645079, 832360, 988280, 1290158, 2580316, 3225395, 5160632, 6450790, 12901580, 16584773, 25803160, 33169546, 66339092, 82923865, 132678184, 165847730, 331695460, 514127963, 663390920, 1028255926, 2056511852, 2570639815, 4113023704, 5141279630, 10282559260, 20565118520]

約数ペア:

[(1, 20565118520), (2, 10282559260), (4, 5141279630), (5, 4113023704), (8, 2570639815), (10, 2056511852), (20, 1028255926), (31, 663390920), (40, 514127963), (62, 331695460), (124, 165847730), (155, 132678184), (248, 82923865), (310, 66339092), (620, 33169546), (797, 25803160), (1240, 16584773), (1594, 12901580), (3188, 6450790), (3985, 5160632), (6376, 3225395), (7970, 2580316), (15940, 1290158), (20809, 988280), (24707, 832360), (31880, 645079), (41618, 494140), (49414, 416180), (83236, 247070), (98828, 208090), (104045, 197656), (123535, 166472)]