20536750

素因数分解:

$2^1\times 5^3\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1$

素因数の和:190

約数の個数: 64

約数和(自身を含む): 42456960

約数和(自身を除く): 21920210

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 71, 89, 125, 130, 142, 178, 250, 325, 355, 445, 650, 710, 890, 923, 1157, 1625, 1775, 1846, 2225, 2314, 3250, 3550, 4450, 4615, 5785, 6319, 8875, 9230, 11125, 11570, 12638, 17750, 22250, 23075, 28925, 31595, 46150, 57850, 63190, 82147, 115375, 144625, 157975, 164294, 230750, 289250, 315950, 410735, 789875, 821470, 1579750, 2053675, 4107350, 10268375, 20536750]

約数ペア:

[(1, 20536750), (2, 10268375), (5, 4107350), (10, 2053675), (13, 1579750), (25, 821470), (26, 789875), (50, 410735), (65, 315950), (71, 289250), (89, 230750), (125, 164294), (130, 157975), (142, 144625), (178, 115375), (250, 82147), (325, 63190), (355, 57850), (445, 46150), (650, 31595), (710, 28925), (890, 23075), (923, 22250), (1157, 17750), (1625, 12638), (1775, 11570), (1846, 11125), (2225, 9230), (2314, 8875), (3250, 6319), (3550, 5785), (4450, 4615)]