991690420

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{53}}^1\times {\mathrm{61}}^1\times {\mathrm{313}}^1$

素因数の和:450

約数の個数: 144

約数和(自身を含む): 2516745168

約数和(自身を除く): 1525054748

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 53, 61, 70, 98, 106, 122, 140, 196, 212, 244, 245, 265, 305, 313, 371, 427, 490, 530, 610, 626, 742, 854, 980, 1060, 1220, 1252, 1484, 1565, 1708, 1855, 2135, 2191, 2597, 2989, 3130, 3233, 3710, 4270, 4382, 5194, 5978, 6260, 6466, 7420, 8540, 8764, 10388, 10955, 11956, 12932, 12985, 14945, 15337, 16165, 16589, 19093, 21910, 22631, 25970, 29890, 30674, 32330, 33178, 38186, 43820, 45262, 51940, 59780, 61348, 64660, 66356, 76372, 76685, 82945, 90524, 95465, 113155, 116123, 133651, 153370, 158417, 165890, 190930, 226310, 232246, 267302, 306740, 316834, 331780, 381860, 452620, 464492, 534604, 580615, 633668, 668255, 792085, 812861, 935557, 1011929, 1161230, 1336510, 1584170, 1625722, 1871114, 2023858, 2322460, 2673020, 3168340, 3251444, 3742228, 4047716, 4064305, 4677785, 5059645, 7083503, 8128610, 9355570, 10119290, 14167006, 16257220, 18711140, 20238580, 28334012, 35417515, 49584521, 70835030, 99169042, 141670060, 198338084, 247922605, 495845210, 991690420]

約数ペア:

[(1, 991690420), (2, 495845210), (4, 247922605), (5, 198338084), (7, 141670060), (10, 99169042), (14, 70835030), (20, 49584521), (28, 35417515), (35, 28334012), (49, 20238580), (53, 18711140), (61, 16257220), (70, 14167006), (98, 10119290), (106, 9355570), (122, 8128610), (140, 7083503), (196, 5059645), (212, 4677785), (244, 4064305), (245, 4047716), (265, 3742228), (305, 3251444), (313, 3168340), (371, 2673020), (427, 2322460), (490, 2023858), (530, 1871114), (610, 1625722), (626, 1584170), (742, 1336510), (854, 1161230), (980, 1011929), (1060, 935557), (1220, 812861), (1252, 792085), (1484, 668255), (1565, 633668), (1708, 580615), (1855, 534604), (2135, 464492), (2191, 452620), (2597, 381860), (2989, 331780), (3130, 316834), (3233, 306740), (3710, 267302), (4270, 232246), (4382, 226310), (5194, 190930), (5978, 165890), (6260, 158417), (6466, 153370), (7420, 133651), (8540, 116123), (8764, 113155), (10388, 95465), (10955, 90524), (11956, 82945), (12932, 76685), (12985, 76372), (14945, 66356), (15337, 64660), (16165, 61348), (16589, 59780), (19093, 51940), (21910, 45262), (22631, 43820), (25970, 38186), (29890, 33178), (30674, 32330)]