21201380

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{127}}^1\times {\mathrm{491}}^1$

素因数の和:644

約数の個数: 48

約数和(自身を含む): 47609856

約数和(自身を除く): 26408476

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 127, 170, 254, 340, 491, 508, 635, 982, 1270, 1964, 2159, 2455, 2540, 4318, 4910, 8347, 8636, 9820, 10795, 16694, 21590, 33388, 41735, 43180, 62357, 83470, 124714, 166940, 249428, 311785, 623570, 1060069, 1247140, 2120138, 4240276, 5300345, 10600690, 21201380]

約数ペア:

[(1, 21201380), (2, 10600690), (4, 5300345), (5, 4240276), (10, 2120138), (17, 1247140), (20, 1060069), (34, 623570), (68, 311785), (85, 249428), (127, 166940), (170, 124714), (254, 83470), (340, 62357), (491, 43180), (508, 41735), (635, 33388), (982, 21590), (1270, 16694), (1964, 10795), (2159, 9820), (2455, 8636), (2540, 8347), (4318, 4910)]