19912984

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1609}}^1$

素因数の和:1652

約数の個数: 64

約数和(自身を含む): 48686400

約数和(自身を除く): 28773416

約数列:

[1, 2, 4, 7, 8, 13, 14, 17, 26, 28, 34, 52, 56, 68, 91, 104, 119, 136, 182, 221, 238, 364, 442, 476, 728, 884, 952, 1547, 1609, 1768, 3094, 3218, 6188, 6436, 11263, 12376, 12872, 20917, 22526, 27353, 41834, 45052, 54706, 83668, 90104, 109412, 146419, 167336, 191471, 218824, 292838, 355589, 382942, 585676, 711178, 765884, 1171352, 1422356, 1531768, 2489123, 2844712, 4978246, 9956492, 19912984]

約数ペア:

[(1, 19912984), (2, 9956492), (4, 4978246), (7, 2844712), (8, 2489123), (13, 1531768), (14, 1422356), (17, 1171352), (26, 765884), (28, 711178), (34, 585676), (52, 382942), (56, 355589), (68, 292838), (91, 218824), (104, 191471), (119, 167336), (136, 146419), (182, 109412), (221, 90104), (238, 83668), (364, 54706), (442, 45052), (476, 41834), (728, 27353), (884, 22526), (952, 20917), (1547, 12872), (1609, 12376), (1768, 11263), (3094, 6436), (3218, 6188)]