19863740

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{4021}}^1$

素因数の和:4062

約数の個数: 48

約数和(自身を含む): 47298720

約数和(自身を除く): 27434980

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 65, 76, 95, 130, 190, 247, 260, 380, 494, 988, 1235, 2470, 4021, 4940, 8042, 16084, 20105, 40210, 52273, 76399, 80420, 104546, 152798, 209092, 261365, 305596, 381995, 522730, 763990, 993187, 1045460, 1527980, 1986374, 3972748, 4965935, 9931870, 19863740]

約数ペア:

[(1, 19863740), (2, 9931870), (4, 4965935), (5, 3972748), (10, 1986374), (13, 1527980), (19, 1045460), (20, 993187), (26, 763990), (38, 522730), (52, 381995), (65, 305596), (76, 261365), (95, 209092), (130, 152798), (190, 104546), (247, 80420), (260, 76399), (380, 52273), (494, 40210), (988, 20105), (1235, 16084), (2470, 8042), (4021, 4940)]