81909380

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{83}}^1$

素因数の和:178

約数の個数: 144

約数和(自身を含む): 217183680

約数和(自身を除く): 135274300

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 49, 53, 70, 76, 83, 95, 98, 106, 133, 140, 166, 190, 196, 212, 245, 265, 266, 332, 371, 380, 415, 490, 530, 532, 581, 665, 742, 830, 931, 980, 1007, 1060, 1162, 1330, 1484, 1577, 1660, 1855, 1862, 2014, 2324, 2597, 2660, 2905, 3154, 3710, 3724, 4028, 4067, 4399, 4655, 5035, 5194, 5810, 6308, 7049, 7420, 7885, 8134, 8798, 9310, 10070, 10388, 11039, 11620, 12985, 14098, 15770, 16268, 17596, 18620, 20140, 20335, 21995, 22078, 25970, 28196, 30793, 31540, 35245, 40670, 43990, 44156, 49343, 51940, 55195, 61586, 70490, 77273, 81340, 83581, 87980, 98686, 110390, 123172, 140980, 153965, 154546, 167162, 197372, 215551, 220780, 246715, 307930, 309092, 334324, 386365, 417905, 431102, 493430, 585067, 615860, 772730, 835810, 862204, 986860, 1077755, 1170134, 1545460, 1671620, 2155510, 2340268, 2925335, 4095469, 4311020, 5850670, 8190938, 11701340, 16381876, 20477345, 40954690, 81909380]

約数ペア:

[(1, 81909380), (2, 40954690), (4, 20477345), (5, 16381876), (7, 11701340), (10, 8190938), (14, 5850670), (19, 4311020), (20, 4095469), (28, 2925335), (35, 2340268), (38, 2155510), (49, 1671620), (53, 1545460), (70, 1170134), (76, 1077755), (83, 986860), (95, 862204), (98, 835810), (106, 772730), (133, 615860), (140, 585067), (166, 493430), (190, 431102), (196, 417905), (212, 386365), (245, 334324), (265, 309092), (266, 307930), (332, 246715), (371, 220780), (380, 215551), (415, 197372), (490, 167162), (530, 154546), (532, 153965), (581, 140980), (665, 123172), (742, 110390), (830, 98686), (931, 87980), (980, 83581), (1007, 81340), (1060, 77273), (1162, 70490), (1330, 61586), (1484, 55195), (1577, 51940), (1660, 49343), (1855, 44156), (1862, 43990), (2014, 40670), (2324, 35245), (2597, 31540), (2660, 30793), (2905, 28196), (3154, 25970), (3710, 22078), (3724, 21995), (4028, 20335), (4067, 20140), (4399, 18620), (4655, 17596), (5035, 16268), (5194, 15770), (5810, 14098), (6308, 12985), (7049, 11620), (7420, 11039), (7885, 10388), (8134, 10070), (8798, 9310)]