20982990

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{163}}^1\times {\mathrm{613}}^1$

素因数の和:793

約数の個数: 64

約数和(自身を含む): 58000896

約数和(自身を除く): 37017906

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 42, 70, 105, 163, 210, 326, 489, 613, 815, 978, 1141, 1226, 1630, 1839, 2282, 2445, 3065, 3423, 3678, 4291, 4890, 5705, 6130, 6846, 8582, 9195, 11410, 12873, 17115, 18390, 21455, 25746, 34230, 42910, 64365, 99919, 128730, 199838, 299757, 499595, 599514, 699433, 999190, 1398866, 1498785, 2098299, 2997570, 3497165, 4196598, 6994330, 10491495, 20982990]

約数ペア:

[(1, 20982990), (2, 10491495), (3, 6994330), (5, 4196598), (6, 3497165), (7, 2997570), (10, 2098299), (14, 1498785), (15, 1398866), (21, 999190), (30, 699433), (35, 599514), (42, 499595), (70, 299757), (105, 199838), (163, 128730), (210, 99919), (326, 64365), (489, 42910), (613, 34230), (815, 25746), (978, 21455), (1141, 18390), (1226, 17115), (1630, 12873), (1839, 11410), (2282, 9195), (2445, 8582), (3065, 6846), (3423, 6130), (3678, 5705), (4291, 4890)]