21618675

素因数分解:

$3^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{389}}^1$

素因数の和:437

約数の個数: 72

約数和(自身を含む): 44007600

約数和(自身を除く): 22388925

約数列:

[1, 3, 5, 9, 13, 15, 19, 25, 39, 45, 57, 65, 75, 95, 117, 171, 195, 225, 247, 285, 325, 389, 475, 585, 741, 855, 975, 1167, 1235, 1425, 1945, 2223, 2925, 3501, 3705, 4275, 5057, 5835, 6175, 7391, 9725, 11115, 15171, 17505, 18525, 22173, 25285, 29175, 36955, 45513, 55575, 66519, 75855, 87525, 96083, 110865, 126425, 184775, 227565, 288249, 332595, 379275, 480415, 554325, 864747, 1137825, 1441245, 1662975, 2402075, 4323735, 7206225, 21618675]

約数ペア:

[(1, 21618675), (3, 7206225), (5, 4323735), (9, 2402075), (13, 1662975), (15, 1441245), (19, 1137825), (25, 864747), (39, 554325), (45, 480415), (57, 379275), (65, 332595), (75, 288249), (95, 227565), (117, 184775), (171, 126425), (195, 110865), (225, 96083), (247, 87525), (285, 75855), (325, 66519), (389, 55575), (475, 45513), (585, 36955), (741, 29175), (855, 25285), (975, 22173), (1167, 18525), (1235, 17505), (1425, 15171), (1945, 11115), (2223, 9725), (2925, 7391), (3501, 6175), (3705, 5835), (4275, 5057)]