1285191220

素因数分解:

$2^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{139}}^1\times {\mathrm{3529}}^1$

素因数の和:3808

約数の個数: 48

約数和(自身を含む): 2739844800

約数和(自身を除く): 1454653580

約数列:

[1, 2, 4, 5, 10, 20, 131, 139, 262, 278, 524, 556, 655, 695, 1310, 1390, 2620, 2780, 3529, 7058, 14116, 17645, 18209, 35290, 36418, 70580, 72836, 91045, 182090, 364180, 462299, 490531, 924598, 981062, 1849196, 1962124, 2311495, 2452655, 4622990, 4905310, 9245980, 9810620, 64259561, 128519122, 257038244, 321297805, 642595610, 1285191220]

約数ペア:

[(1, 1285191220), (2, 642595610), (4, 321297805), (5, 257038244), (10, 128519122), (20, 64259561), (131, 9810620), (139, 9245980), (262, 4905310), (278, 4622990), (524, 2452655), (556, 2311495), (655, 1962124), (695, 1849196), (1310, 981062), (1390, 924598), (2620, 490531), (2780, 462299), (3529, 364180), (7058, 182090), (14116, 91045), (17645, 72836), (18209, 70580), (35290, 36418)]