18722925

素因数分解:

$3^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{173}}^1$

素因数の和:239

約数の個数: 72

約数和(自身を含む): 37304904

約数和(自身を除く): 18581979

約数列:

[1, 3, 5, 9, 13, 15, 25, 37, 39, 45, 65, 75, 111, 117, 173, 185, 195, 225, 325, 333, 481, 519, 555, 585, 865, 925, 975, 1443, 1557, 1665, 2249, 2405, 2595, 2775, 2925, 4325, 4329, 6401, 6747, 7215, 7785, 8325, 11245, 12025, 12975, 19203, 20241, 21645, 32005, 33735, 36075, 38925, 56225, 57609, 83213, 96015, 101205, 108225, 160025, 168675, 249639, 288045, 416065, 480075, 506025, 748917, 1248195, 1440225, 2080325, 3744585, 6240975, 18722925]

約数ペア:

[(1, 18722925), (3, 6240975), (5, 3744585), (9, 2080325), (13, 1440225), (15, 1248195), (25, 748917), (37, 506025), (39, 480075), (45, 416065), (65, 288045), (75, 249639), (111, 168675), (117, 160025), (173, 108225), (185, 101205), (195, 96015), (225, 83213), (325, 57609), (333, 56225), (481, 38925), (519, 36075), (555, 33735), (585, 32005), (865, 21645), (925, 20241), (975, 19203), (1443, 12975), (1557, 12025), (1665, 11245), (2249, 8325), (2405, 7785), (2595, 7215), (2775, 6747), (2925, 6401), (4325, 4329)]