181518640

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{1381}}^1$

素因数の和:1478

約数の個数: 80

約数和(自身を含む): 444185856

約数和(自身を除く): 262667216

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 53, 62, 80, 106, 124, 155, 212, 248, 265, 310, 424, 496, 530, 620, 848, 1060, 1240, 1381, 1643, 2120, 2480, 2762, 3286, 4240, 5524, 6572, 6905, 8215, 11048, 13144, 13810, 16430, 22096, 26288, 27620, 32860, 42811, 55240, 65720, 73193, 85622, 110480, 131440, 146386, 171244, 214055, 292772, 342488, 365965, 428110, 585544, 684976, 731930, 856220, 1171088, 1463860, 1712440, 2268983, 2927720, 3424880, 4537966, 5855440, 9075932, 11344915, 18151864, 22689830, 36303728, 45379660, 90759320, 181518640]

約数ペア:

[(1, 181518640), (2, 90759320), (4, 45379660), (5, 36303728), (8, 22689830), (10, 18151864), (16, 11344915), (20, 9075932), (31, 5855440), (40, 4537966), (53, 3424880), (62, 2927720), (80, 2268983), (106, 1712440), (124, 1463860), (155, 1171088), (212, 856220), (248, 731930), (265, 684976), (310, 585544), (424, 428110), (496, 365965), (530, 342488), (620, 292772), (848, 214055), (1060, 171244), (1240, 146386), (1381, 131440), (1643, 110480), (2120, 85622), (2480, 73193), (2762, 65720), (3286, 55240), (4240, 42811), (5524, 32860), (6572, 27620), (6905, 26288), (8215, 22096), (11048, 16430), (13144, 13810)]