20289840

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{4973}}^1$

素因数の和:5006

約数の個数: 80

約数和(自身を含む): 66611808

約数和(自身を除く): 46321968

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 17, 20, 24, 30, 34, 40, 48, 51, 60, 68, 80, 85, 102, 120, 136, 170, 204, 240, 255, 272, 340, 408, 510, 680, 816, 1020, 1360, 2040, 4080, 4973, 9946, 14919, 19892, 24865, 29838, 39784, 49730, 59676, 74595, 79568, 84541, 99460, 119352, 149190, 169082, 198920, 238704, 253623, 298380, 338164, 397840, 422705, 507246, 596760, 676328, 845410, 1014492, 1193520, 1268115, 1352656, 1690820, 2028984, 2536230, 3381640, 4057968, 5072460, 6763280, 10144920, 20289840]

約数ペア:

[(1, 20289840), (2, 10144920), (3, 6763280), (4, 5072460), (5, 4057968), (6, 3381640), (8, 2536230), (10, 2028984), (12, 1690820), (15, 1352656), (16, 1268115), (17, 1193520), (20, 1014492), (24, 845410), (30, 676328), (34, 596760), (40, 507246), (48, 422705), (51, 397840), (60, 338164), (68, 298380), (80, 253623), (85, 238704), (102, 198920), (120, 169082), (136, 149190), (170, 119352), (204, 99460), (240, 84541), (255, 79568), (272, 74595), (340, 59676), (408, 49730), (510, 39784), (680, 29838), (816, 24865), (1020, 19892), (1360, 14919), (2040, 9946), (4080, 4973)]