20875140

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{811}}^1$

素因数の和:850

約数の個数: 144

約数和(自身を含む): 74483136

約数和(自身を除く): 53607996

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 13, 15, 18, 20, 22, 26, 30, 33, 36, 39, 44, 45, 52, 55, 60, 65, 66, 78, 90, 99, 110, 117, 130, 132, 143, 156, 165, 180, 195, 198, 220, 234, 260, 286, 330, 390, 396, 429, 468, 495, 572, 585, 660, 715, 780, 811, 858, 990, 1170, 1287, 1430, 1622, 1716, 1980, 2145, 2340, 2433, 2574, 2860, 3244, 4055, 4290, 4866, 5148, 6435, 7299, 8110, 8580, 8921, 9732, 10543, 12165, 12870, 14598, 16220, 17842, 21086, 24330, 25740, 26763, 29196, 31629, 35684, 36495, 42172, 44605, 48660, 52715, 53526, 63258, 72990, 80289, 89210, 94887, 105430, 107052, 115973, 126516, 133815, 145980, 158145, 160578, 178420, 189774, 210860, 231946, 267630, 316290, 321156, 347919, 379548, 401445, 463892, 474435, 535260, 579865, 632580, 695838, 802890, 948870, 1043757, 1159730, 1391676, 1605780, 1739595, 1897740, 2087514, 2319460, 3479190, 4175028, 5218785, 6958380, 10437570, 20875140]

約数ペア:

[(1, 20875140), (2, 10437570), (3, 6958380), (4, 5218785), (5, 4175028), (6, 3479190), (9, 2319460), (10, 2087514), (11, 1897740), (12, 1739595), (13, 1605780), (15, 1391676), (18, 1159730), (20, 1043757), (22, 948870), (26, 802890), (30, 695838), (33, 632580), (36, 579865), (39, 535260), (44, 474435), (45, 463892), (52, 401445), (55, 379548), (60, 347919), (65, 321156), (66, 316290), (78, 267630), (90, 231946), (99, 210860), (110, 189774), (117, 178420), (130, 160578), (132, 158145), (143, 145980), (156, 133815), (165, 126516), (180, 115973), (195, 107052), (198, 105430), (220, 94887), (234, 89210), (260, 80289), (286, 72990), (330, 63258), (390, 53526), (396, 52715), (429, 48660), (468, 44605), (495, 42172), (572, 36495), (585, 35684), (660, 31629), (715, 29196), (780, 26763), (811, 25740), (858, 24330), (990, 21086), (1170, 17842), (1287, 16220), (1430, 14598), (1622, 12870), (1716, 12165), (1980, 10543), (2145, 9732), (2340, 8921), (2433, 8580), (2574, 8110), (2860, 7299), (3244, 6435), (4055, 5148), (4290, 4866)]