18784870

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{229}}^1\times {\mathrm{631}}^1$

素因数の和:880

約数の個数: 32

約数和(自身を含む): 36630720

約数和(自身を除く): 17845850

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 229, 458, 631, 1145, 1262, 2290, 2977, 3155, 5954, 6310, 8203, 14885, 16406, 29770, 41015, 82030, 144499, 288998, 722495, 1444990, 1878487, 3756974, 9392435, 18784870]

約数ペア:

[(1, 18784870), (2, 9392435), (5, 3756974), (10, 1878487), (13, 1444990), (26, 722495), (65, 288998), (130, 144499), (229, 82030), (458, 41015), (631, 29770), (1145, 16406), (1262, 14885), (2290, 8203), (2977, 6310), (3155, 5954)]