81489980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{28493}}^1$

素因数の和:28526

約数の個数: 48

約数和(自身を含む): 201053664

約数和(自身を除く): 119563684

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 44, 52, 55, 65, 110, 130, 143, 220, 260, 286, 572, 715, 1430, 2860, 28493, 56986, 113972, 142465, 284930, 313423, 370409, 569860, 626846, 740818, 1253692, 1481636, 1567115, 1852045, 3134230, 3704090, 4074499, 6268460, 7408180, 8148998, 16297996, 20372495, 40744990, 81489980]

約数ペア:

[(1, 81489980), (2, 40744990), (4, 20372495), (5, 16297996), (10, 8148998), (11, 7408180), (13, 6268460), (20, 4074499), (22, 3704090), (26, 3134230), (44, 1852045), (52, 1567115), (55, 1481636), (65, 1253692), (110, 740818), (130, 626846), (143, 569860), (220, 370409), (260, 313423), (286, 284930), (572, 142465), (715, 113972), (1430, 56986), (2860, 28493)]