21770900

素因数分解:

$2^2\times 5^2\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{83}}^1$

素因数の和:201

約数の個数: 72

約数和(自身を含む): 49725984

約数和(自身を除く): 27955084

約数列:

[1, 2, 4, 5, 10, 20, 25, 43, 50, 61, 83, 86, 100, 122, 166, 172, 215, 244, 305, 332, 415, 430, 610, 830, 860, 1075, 1220, 1525, 1660, 2075, 2150, 2623, 3050, 3569, 4150, 4300, 5063, 5246, 6100, 7138, 8300, 10126, 10492, 13115, 14276, 17845, 20252, 25315, 26230, 35690, 50630, 52460, 65575, 71380, 89225, 101260, 126575, 131150, 178450, 217709, 253150, 262300, 356900, 435418, 506300, 870836, 1088545, 2177090, 4354180, 5442725, 10885450, 21770900]

約数ペア:

[(1, 21770900), (2, 10885450), (4, 5442725), (5, 4354180), (10, 2177090), (20, 1088545), (25, 870836), (43, 506300), (50, 435418), (61, 356900), (83, 262300), (86, 253150), (100, 217709), (122, 178450), (166, 131150), (172, 126575), (215, 101260), (244, 89225), (305, 71380), (332, 65575), (415, 52460), (430, 50630), (610, 35690), (830, 26230), (860, 25315), (1075, 20252), (1220, 17845), (1525, 14276), (1660, 13115), (2075, 10492), (2150, 10126), (2623, 8300), (3050, 7138), (3569, 6100), (4150, 5246), (4300, 5063)]