81558520

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{73}}^1$

素因数の和:185

約数の個数: 128

約数和(自身を含む): 207152640

約数和(自身を除く): 125594120

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 31, 34, 40, 53, 62, 68, 73, 85, 106, 124, 136, 146, 155, 170, 212, 248, 265, 292, 310, 340, 365, 424, 527, 530, 584, 620, 680, 730, 901, 1054, 1060, 1240, 1241, 1460, 1643, 1802, 2108, 2120, 2263, 2482, 2635, 2920, 3286, 3604, 3869, 4216, 4505, 4526, 4964, 5270, 6205, 6572, 7208, 7738, 8215, 9010, 9052, 9928, 10540, 11315, 12410, 13144, 15476, 16430, 18020, 18104, 19345, 21080, 22630, 24820, 27931, 30952, 32860, 36040, 38471, 38690, 45260, 49640, 55862, 65720, 65773, 76942, 77380, 90520, 111724, 119939, 131546, 139655, 153884, 154760, 192355, 223448, 239878, 263092, 279310, 307768, 328865, 384710, 479756, 526184, 558620, 599695, 657730, 769420, 959512, 1117240, 1199390, 1315460, 1538840, 2038963, 2398780, 2630920, 4077926, 4797560, 8155852, 10194815, 16311704, 20389630, 40779260, 81558520]

約数ペア:

[(1, 81558520), (2, 40779260), (4, 20389630), (5, 16311704), (8, 10194815), (10, 8155852), (17, 4797560), (20, 4077926), (31, 2630920), (34, 2398780), (40, 2038963), (53, 1538840), (62, 1315460), (68, 1199390), (73, 1117240), (85, 959512), (106, 769420), (124, 657730), (136, 599695), (146, 558620), (155, 526184), (170, 479756), (212, 384710), (248, 328865), (265, 307768), (292, 279310), (310, 263092), (340, 239878), (365, 223448), (424, 192355), (527, 154760), (530, 153884), (584, 139655), (620, 131546), (680, 119939), (730, 111724), (901, 90520), (1054, 77380), (1060, 76942), (1240, 65773), (1241, 65720), (1460, 55862), (1643, 49640), (1802, 45260), (2108, 38690), (2120, 38471), (2263, 36040), (2482, 32860), (2635, 30952), (2920, 27931), (3286, 24820), (3604, 22630), (3869, 21080), (4216, 19345), (4505, 18104), (4526, 18020), (4964, 16430), (5270, 15476), (6205, 13144), (6572, 12410), (7208, 11315), (7738, 10540), (8215, 9928), (9010, 9052)]