988889880

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{181}}^1\times {\mathrm{4139}}^1$

素因数の和:4345

約数の個数: 128

約数和(自身を含む): 3255033600

約数和(自身を除く): 2266143720

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 20, 22, 24, 30, 33, 40, 44, 55, 60, 66, 88, 110, 120, 132, 165, 181, 220, 264, 330, 362, 440, 543, 660, 724, 905, 1086, 1320, 1448, 1810, 1991, 2172, 2715, 3620, 3982, 4139, 4344, 5430, 5973, 7240, 7964, 8278, 9955, 10860, 11946, 12417, 15928, 16556, 19910, 20695, 21720, 23892, 24834, 29865, 33112, 39820, 41390, 45529, 47784, 49668, 59730, 62085, 79640, 82780, 91058, 99336, 119460, 124170, 136587, 165560, 182116, 227645, 238920, 248340, 273174, 364232, 455290, 496680, 546348, 682935, 749159, 910580, 1092696, 1365870, 1498318, 1821160, 2247477, 2731740, 2996636, 3745795, 4494954, 5463480, 5993272, 7491590, 8240749, 8989908, 11237385, 14983180, 16481498, 17979816, 22474770, 24722247, 29966360, 32962996, 41203745, 44949540, 49444494, 65925992, 82407490, 89899080, 98888988, 123611235, 164814980, 197777976, 247222470, 329629960, 494444940, 988889880]

約数ペア:

[(1, 988889880), (2, 494444940), (3, 329629960), (4, 247222470), (5, 197777976), (6, 164814980), (8, 123611235), (10, 98888988), (11, 89899080), (12, 82407490), (15, 65925992), (20, 49444494), (22, 44949540), (24, 41203745), (30, 32962996), (33, 29966360), (40, 24722247), (44, 22474770), (55, 17979816), (60, 16481498), (66, 14983180), (88, 11237385), (110, 8989908), (120, 8240749), (132, 7491590), (165, 5993272), (181, 5463480), (220, 4494954), (264, 3745795), (330, 2996636), (362, 2731740), (440, 2247477), (543, 1821160), (660, 1498318), (724, 1365870), (905, 1092696), (1086, 910580), (1320, 749159), (1448, 682935), (1810, 546348), (1991, 496680), (2172, 455290), (2715, 364232), (3620, 273174), (3982, 248340), (4139, 238920), (4344, 227645), (5430, 182116), (5973, 165560), (7240, 136587), (7964, 124170), (8278, 119460), (9955, 99336), (10860, 91058), (11946, 82780), (12417, 79640), (15928, 62085), (16556, 59730), (19910, 49668), (20695, 47784), (21720, 45529), (23892, 41390), (24834, 39820), (29865, 33112)]