21266260

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{83}}^1\times {\mathrm{557}}^1$

素因数の和:672

約数の個数: 48

約数和(自身を含む): 47246976

約数和(自身を除く): 25980716

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 83, 92, 115, 166, 230, 332, 415, 460, 557, 830, 1114, 1660, 1909, 2228, 2785, 3818, 5570, 7636, 9545, 11140, 12811, 19090, 25622, 38180, 46231, 51244, 64055, 92462, 128110, 184924, 231155, 256220, 462310, 924620, 1063313, 2126626, 4253252, 5316565, 10633130, 21266260]

約数ペア:

[(1, 21266260), (2, 10633130), (4, 5316565), (5, 4253252), (10, 2126626), (20, 1063313), (23, 924620), (46, 462310), (83, 256220), (92, 231155), (115, 184924), (166, 128110), (230, 92462), (332, 64055), (415, 51244), (460, 46231), (557, 38180), (830, 25622), (1114, 19090), (1660, 12811), (1909, 11140), (2228, 9545), (2785, 7636), (3818, 5570)]