19687290

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{241}}^1\times {\mathrm{389}}^1$

素因数の和:647

約数の個数: 64

約数和(自身を含む): 54362880

約数和(自身を除く): 34675590

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 42, 70, 105, 210, 241, 389, 482, 723, 778, 1167, 1205, 1446, 1687, 1945, 2334, 2410, 2723, 3374, 3615, 3890, 5061, 5446, 5835, 7230, 8169, 8435, 10122, 11670, 13615, 16338, 16870, 25305, 27230, 40845, 50610, 81690, 93749, 187498, 281247, 468745, 562494, 656243, 937490, 1312486, 1406235, 1968729, 2812470, 3281215, 3937458, 6562430, 9843645, 19687290]

約数ペア:

[(1, 19687290), (2, 9843645), (3, 6562430), (5, 3937458), (6, 3281215), (7, 2812470), (10, 1968729), (14, 1406235), (15, 1312486), (21, 937490), (30, 656243), (35, 562494), (42, 468745), (70, 281247), (105, 187498), (210, 93749), (241, 81690), (389, 50610), (482, 40845), (723, 27230), (778, 25305), (1167, 16870), (1205, 16338), (1446, 13615), (1687, 11670), (1945, 10122), (2334, 8435), (2410, 8169), (2723, 7230), (3374, 5835), (3615, 5446), (3890, 5061)]