20451420

素因数分解:

$2^2\times 3^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{313}}^1$

素因数の和:353

約数の個数: 144

約数和(自身を含む): 70160160

約数和(自身を除く): 49708740

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 27, 30, 33, 36, 44, 45, 54, 55, 60, 66, 90, 99, 108, 110, 121, 132, 135, 165, 180, 198, 220, 242, 270, 297, 313, 330, 363, 396, 484, 495, 540, 594, 605, 626, 660, 726, 939, 990, 1089, 1188, 1210, 1252, 1452, 1485, 1565, 1815, 1878, 1980, 2178, 2420, 2817, 2970, 3130, 3267, 3443, 3630, 3756, 4356, 4695, 5445, 5634, 5940, 6260, 6534, 6886, 7260, 8451, 9390, 10329, 10890, 11268, 13068, 13772, 14085, 16335, 16902, 17215, 18780, 20658, 21780, 28170, 30987, 32670, 33804, 34430, 37873, 41316, 42255, 51645, 56340, 61974, 65340, 68860, 75746, 84510, 92961, 103290, 113619, 123948, 151492, 154935, 169020, 185922, 189365, 206580, 227238, 309870, 340857, 371844, 378730, 454476, 464805, 568095, 619740, 681714, 757460, 929610, 1022571, 1136190, 1363428, 1704285, 1859220, 2045142, 2272380, 3408570, 4090284, 5112855, 6817140, 10225710, 20451420]

約数ペア:

[(1, 20451420), (2, 10225710), (3, 6817140), (4, 5112855), (5, 4090284), (6, 3408570), (9, 2272380), (10, 2045142), (11, 1859220), (12, 1704285), (15, 1363428), (18, 1136190), (20, 1022571), (22, 929610), (27, 757460), (30, 681714), (33, 619740), (36, 568095), (44, 464805), (45, 454476), (54, 378730), (55, 371844), (60, 340857), (66, 309870), (90, 227238), (99, 206580), (108, 189365), (110, 185922), (121, 169020), (132, 154935), (135, 151492), (165, 123948), (180, 113619), (198, 103290), (220, 92961), (242, 84510), (270, 75746), (297, 68860), (313, 65340), (330, 61974), (363, 56340), (396, 51645), (484, 42255), (495, 41316), (540, 37873), (594, 34430), (605, 33804), (626, 32670), (660, 30987), (726, 28170), (939, 21780), (990, 20658), (1089, 18780), (1188, 17215), (1210, 16902), (1252, 16335), (1452, 14085), (1485, 13772), (1565, 13068), (1815, 11268), (1878, 10890), (1980, 10329), (2178, 9390), (2420, 8451), (2817, 7260), (2970, 6886), (3130, 6534), (3267, 6260), (3443, 5940), (3630, 5634), (3756, 5445), (4356, 4695)]