161231000

素因数分解:

$2^3\times 5^3\times 7^1\times {\mathrm{31}}^1\times {\mathrm{743}}^1$

素因数の和:802

約数の個数: 128

約数和(自身を含む): 445685760

約数和(自身を除く): 284454760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 25, 28, 31, 35, 40, 50, 56, 62, 70, 100, 124, 125, 140, 155, 175, 200, 217, 248, 250, 280, 310, 350, 434, 500, 620, 700, 743, 775, 868, 875, 1000, 1085, 1240, 1400, 1486, 1550, 1736, 1750, 2170, 2972, 3100, 3500, 3715, 3875, 4340, 5201, 5425, 5944, 6200, 7000, 7430, 7750, 8680, 10402, 10850, 14860, 15500, 18575, 20804, 21700, 23033, 26005, 27125, 29720, 31000, 37150, 41608, 43400, 46066, 52010, 54250, 74300, 92132, 92875, 104020, 108500, 115165, 130025, 148600, 161231, 184264, 185750, 208040, 217000, 230330, 260050, 322462, 371500, 460660, 520100, 575825, 644924, 650125, 743000, 806155, 921320, 1040200, 1151650, 1289848, 1300250, 1612310, 2303300, 2600500, 2879125, 3224620, 4030775, 4606600, 5201000, 5758250, 6449240, 8061550, 11516500, 16123100, 20153875, 23033000, 32246200, 40307750, 80615500, 161231000]

約数ペア:

[(1, 161231000), (2, 80615500), (4, 40307750), (5, 32246200), (7, 23033000), (8, 20153875), (10, 16123100), (14, 11516500), (20, 8061550), (25, 6449240), (28, 5758250), (31, 5201000), (35, 4606600), (40, 4030775), (50, 3224620), (56, 2879125), (62, 2600500), (70, 2303300), (100, 1612310), (124, 1300250), (125, 1289848), (140, 1151650), (155, 1040200), (175, 921320), (200, 806155), (217, 743000), (248, 650125), (250, 644924), (280, 575825), (310, 520100), (350, 460660), (434, 371500), (500, 322462), (620, 260050), (700, 230330), (743, 217000), (775, 208040), (868, 185750), (875, 184264), (1000, 161231), (1085, 148600), (1240, 130025), (1400, 115165), (1486, 108500), (1550, 104020), (1736, 92875), (1750, 92132), (2170, 74300), (2972, 54250), (3100, 52010), (3500, 46066), (3715, 43400), (3875, 41608), (4340, 37150), (5201, 31000), (5425, 29720), (5944, 27125), (6200, 26005), (7000, 23033), (7430, 21700), (7750, 20804), (8680, 18575), (10402, 15500), (10850, 14860)]