201404920

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{197}}^1\times {\mathrm{419}}^1$

素因数の和:688

約数の個数: 64

約数和(自身を含む): 464032800

約数和(自身を除く): 262627880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 197, 244, 305, 394, 419, 488, 610, 788, 838, 985, 1220, 1576, 1676, 1970, 2095, 2440, 3352, 3940, 4190, 7880, 8380, 12017, 16760, 24034, 25559, 48068, 51118, 60085, 82543, 96136, 102236, 120170, 127795, 165086, 204472, 240340, 255590, 330172, 412715, 480680, 511180, 660344, 825430, 1022360, 1650860, 3301720, 5035123, 10070246, 20140492, 25175615, 40280984, 50351230, 100702460, 201404920]

約数ペア:

[(1, 201404920), (2, 100702460), (4, 50351230), (5, 40280984), (8, 25175615), (10, 20140492), (20, 10070246), (40, 5035123), (61, 3301720), (122, 1650860), (197, 1022360), (244, 825430), (305, 660344), (394, 511180), (419, 480680), (488, 412715), (610, 330172), (788, 255590), (838, 240340), (985, 204472), (1220, 165086), (1576, 127795), (1676, 120170), (1970, 102236), (2095, 96136), (2440, 82543), (3352, 60085), (3940, 51118), (4190, 48068), (7880, 25559), (8380, 24034), (12017, 16760)]