81721890

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{1723}}^1$

素因数の和:1784

約数の個数: 96

約数和(自身を含む): 232367616

約数和(自身を除く): 150645726

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 17, 18, 30, 31, 34, 45, 51, 62, 85, 90, 93, 102, 153, 155, 170, 186, 255, 279, 306, 310, 465, 510, 527, 558, 765, 930, 1054, 1395, 1530, 1581, 1723, 2635, 2790, 3162, 3446, 4743, 5169, 5270, 7905, 8615, 9486, 10338, 15507, 15810, 17230, 23715, 25845, 29291, 31014, 47430, 51690, 53413, 58582, 77535, 87873, 106826, 146455, 155070, 160239, 175746, 263619, 267065, 292910, 320478, 439365, 480717, 527238, 534130, 801195, 878730, 908021, 961434, 1318095, 1602390, 1816042, 2403585, 2636190, 2724063, 4540105, 4807170, 5448126, 8172189, 9080210, 13620315, 16344378, 27240630, 40860945, 81721890]

約数ペア:

[(1, 81721890), (2, 40860945), (3, 27240630), (5, 16344378), (6, 13620315), (9, 9080210), (10, 8172189), (15, 5448126), (17, 4807170), (18, 4540105), (30, 2724063), (31, 2636190), (34, 2403585), (45, 1816042), (51, 1602390), (62, 1318095), (85, 961434), (90, 908021), (93, 878730), (102, 801195), (153, 534130), (155, 527238), (170, 480717), (186, 439365), (255, 320478), (279, 292910), (306, 267065), (310, 263619), (465, 175746), (510, 160239), (527, 155070), (558, 146455), (765, 106826), (930, 87873), (1054, 77535), (1395, 58582), (1530, 53413), (1581, 51690), (1723, 47430), (2635, 31014), (2790, 29291), (3162, 25845), (3446, 23715), (4743, 17230), (5169, 15810), (5270, 15507), (7905, 10338), (8615, 9486)]