261378940

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{491}}^1\times {\mathrm{619}}^1$

素因数の和:1162

約数の個数: 48

約数和(自身を含む): 563713920

約数和(自身を除く): 302334980

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 491, 619, 860, 982, 1238, 1964, 2455, 2476, 3095, 4910, 6190, 9820, 12380, 21113, 26617, 42226, 53234, 84452, 105565, 106468, 133085, 211130, 266170, 303929, 422260, 532340, 607858, 1215716, 1519645, 3039290, 6078580, 13068947, 26137894, 52275788, 65344735, 130689470, 261378940]

約数ペア:

[(1, 261378940), (2, 130689470), (4, 65344735), (5, 52275788), (10, 26137894), (20, 13068947), (43, 6078580), (86, 3039290), (172, 1519645), (215, 1215716), (430, 607858), (491, 532340), (619, 422260), (860, 303929), (982, 266170), (1238, 211130), (1964, 133085), (2455, 106468), (2476, 105565), (3095, 84452), (4910, 53234), (6190, 42226), (9820, 26617), (12380, 21113)]