18881820

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{5521}}^1$

素因数の和:5555

約数の個数: 72

約数和(自身を含む): 60300240

約数和(自身を除く): 41418420

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 19, 20, 30, 36, 38, 45, 57, 60, 76, 90, 95, 114, 171, 180, 190, 228, 285, 342, 380, 570, 684, 855, 1140, 1710, 3420, 5521, 11042, 16563, 22084, 27605, 33126, 49689, 55210, 66252, 82815, 99378, 104899, 110420, 165630, 198756, 209798, 248445, 314697, 331260, 419596, 496890, 524495, 629394, 944091, 993780, 1048990, 1258788, 1573485, 1888182, 2097980, 3146970, 3776364, 4720455, 6293940, 9440910, 18881820]

約数ペア:

[(1, 18881820), (2, 9440910), (3, 6293940), (4, 4720455), (5, 3776364), (6, 3146970), (9, 2097980), (10, 1888182), (12, 1573485), (15, 1258788), (18, 1048990), (19, 993780), (20, 944091), (30, 629394), (36, 524495), (38, 496890), (45, 419596), (57, 331260), (60, 314697), (76, 248445), (90, 209798), (95, 198756), (114, 165630), (171, 110420), (180, 104899), (190, 99378), (228, 82815), (285, 66252), (342, 55210), (380, 49689), (570, 33126), (684, 27605), (855, 22084), (1140, 16563), (1710, 11042), (3420, 5521)]