21638768

素因数分解:

$2^4\times {\mathrm{23}}^1\times {\mathrm{127}}^1\times {\mathrm{463}}^1$

素因数の和:621

約数の個数: 40

約数和(自身を含む): 44187648

約数和(自身を除く): 22548880

約数列:

[1, 2, 4, 8, 16, 23, 46, 92, 127, 184, 254, 368, 463, 508, 926, 1016, 1852, 2032, 2921, 3704, 5842, 7408, 10649, 11684, 21298, 23368, 42596, 46736, 58801, 85192, 117602, 170384, 235204, 470408, 940816, 1352423, 2704846, 5409692, 10819384, 21638768]

約数ペア:

[(1, 21638768), (2, 10819384), (4, 5409692), (8, 2704846), (16, 1352423), (23, 940816), (46, 470408), (92, 235204), (127, 170384), (184, 117602), (254, 85192), (368, 58801), (463, 46736), (508, 42596), (926, 23368), (1016, 21298), (1852, 11684), (2032, 10649), (2921, 7408), (3704, 5842)]