21861970

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{167}}^1$

素因数の和:259

約数の個数: 64

約数和(自身を含む): 45722880

約数和(自身を除く): 23860910

約数列:

[1, 2, 5, 10, 13, 19, 26, 38, 53, 65, 95, 106, 130, 167, 190, 247, 265, 334, 494, 530, 689, 835, 1007, 1235, 1378, 1670, 2014, 2171, 2470, 3173, 3445, 4342, 5035, 6346, 6890, 8851, 10070, 10855, 13091, 15865, 17702, 21710, 26182, 31730, 41249, 44255, 65455, 82498, 88510, 115063, 130910, 168169, 206245, 230126, 336338, 412490, 575315, 840845, 1150630, 1681690, 2186197, 4372394, 10930985, 21861970]

約数ペア:

[(1, 21861970), (2, 10930985), (5, 4372394), (10, 2186197), (13, 1681690), (19, 1150630), (26, 840845), (38, 575315), (53, 412490), (65, 336338), (95, 230126), (106, 206245), (130, 168169), (167, 130910), (190, 115063), (247, 88510), (265, 82498), (334, 65455), (494, 44255), (530, 41249), (689, 31730), (835, 26182), (1007, 21710), (1235, 17702), (1378, 15865), (1670, 13091), (2014, 10855), (2171, 10070), (2470, 8851), (3173, 6890), (3445, 6346), (4342, 5035)]