21628840

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{149}}^1\times {\mathrm{191}}^1$

素因数の和:370

約数の個数: 64

約数和(自身を含む): 51840000

約数和(自身を除く): 30211160

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 149, 152, 190, 191, 298, 380, 382, 596, 745, 760, 764, 955, 1192, 1490, 1528, 1910, 2831, 2980, 3629, 3820, 5662, 5960, 7258, 7640, 11324, 14155, 14516, 18145, 22648, 28310, 28459, 29032, 36290, 56620, 56918, 72580, 113240, 113836, 142295, 145160, 227672, 284590, 540721, 569180, 1081442, 1138360, 2162884, 2703605, 4325768, 5407210, 10814420, 21628840]

約数ペア:

[(1, 21628840), (2, 10814420), (4, 5407210), (5, 4325768), (8, 2703605), (10, 2162884), (19, 1138360), (20, 1081442), (38, 569180), (40, 540721), (76, 284590), (95, 227672), (149, 145160), (152, 142295), (190, 113836), (191, 113240), (298, 72580), (380, 56918), (382, 56620), (596, 36290), (745, 29032), (760, 28459), (764, 28310), (955, 22648), (1192, 18145), (1490, 14516), (1528, 14155), (1910, 11324), (2831, 7640), (2980, 7258), (3629, 5960), (3820, 5662)]