21163910

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{167}}^1$

素因数の和:245

約数の個数: 64

約数和(自身を含む): 43545600

約数和(自身を除く): 22381690

約数列:

[1, 2, 5, 10, 19, 23, 29, 38, 46, 58, 95, 115, 145, 167, 190, 230, 290, 334, 437, 551, 667, 835, 874, 1102, 1334, 1670, 2185, 2755, 3173, 3335, 3841, 4370, 4843, 5510, 6346, 6670, 7682, 9686, 12673, 15865, 19205, 24215, 25346, 31730, 38410, 48430, 63365, 72979, 92017, 111389, 126730, 145958, 184034, 222778, 364895, 460085, 556945, 729790, 920170, 1113890, 2116391, 4232782, 10581955, 21163910]

約数ペア:

[(1, 21163910), (2, 10581955), (5, 4232782), (10, 2116391), (19, 1113890), (23, 920170), (29, 729790), (38, 556945), (46, 460085), (58, 364895), (95, 222778), (115, 184034), (145, 145958), (167, 126730), (190, 111389), (230, 92017), (290, 72979), (334, 63365), (437, 48430), (551, 38410), (667, 31730), (835, 25346), (874, 24215), (1102, 19205), (1334, 15865), (1670, 12673), (2185, 9686), (2755, 7682), (3173, 6670), (3335, 6346), (3841, 5510), (4370, 4843)]