81490180

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{2693}}^1$

素因数の和:2808

約数の個数: 48

約数和(自身を含む): 183299760

約数和(自身を除く): 101809580

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 89, 170, 178, 340, 356, 445, 890, 1513, 1780, 2693, 3026, 5386, 6052, 7565, 10772, 13465, 15130, 26930, 30260, 45781, 53860, 91562, 183124, 228905, 239677, 457810, 479354, 915620, 958708, 1198385, 2396770, 4074509, 4793540, 8149018, 16298036, 20372545, 40745090, 81490180]

約数ペア:

[(1, 81490180), (2, 40745090), (4, 20372545), (5, 16298036), (10, 8149018), (17, 4793540), (20, 4074509), (34, 2396770), (68, 1198385), (85, 958708), (89, 915620), (170, 479354), (178, 457810), (340, 239677), (356, 228905), (445, 183124), (890, 91562), (1513, 53860), (1780, 45781), (2693, 30260), (3026, 26930), (5386, 15130), (6052, 13465), (7565, 10772)]