20006780

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^2\times {\mathrm{31}}^1\times {\mathrm{61}}^1$

素因数の和:147

約数の個数: 72

約数和(自身を含む): 46080384

約数和(自身を除く): 26073604

約数列:

[1, 2, 4, 5, 10, 20, 23, 31, 46, 61, 62, 92, 115, 122, 124, 155, 230, 244, 305, 310, 460, 529, 610, 620, 713, 1058, 1220, 1403, 1426, 1891, 2116, 2645, 2806, 2852, 3565, 3782, 5290, 5612, 7015, 7130, 7564, 9455, 10580, 14030, 14260, 16399, 18910, 28060, 32269, 32798, 37820, 43493, 64538, 65596, 81995, 86986, 129076, 161345, 163990, 173972, 217465, 322690, 327980, 434930, 645380, 869860, 1000339, 2000678, 4001356, 5001695, 10003390, 20006780]

約数ペア:

[(1, 20006780), (2, 10003390), (4, 5001695), (5, 4001356), (10, 2000678), (20, 1000339), (23, 869860), (31, 645380), (46, 434930), (61, 327980), (62, 322690), (92, 217465), (115, 173972), (122, 163990), (124, 161345), (155, 129076), (230, 86986), (244, 81995), (305, 65596), (310, 64538), (460, 43493), (529, 37820), (610, 32798), (620, 32269), (713, 28060), (1058, 18910), (1220, 16399), (1403, 14260), (1426, 14030), (1891, 10580), (2116, 9455), (2645, 7564), (2806, 7130), (2852, 7015), (3565, 5612), (3782, 5290)]