21470475

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{61}}^1$

素因数の和:125

約数の個数: 72

約数和(自身を含む): 41007792

約数和(自身を除く): 19537317

約数列:

[1, 3, 5, 13, 15, 19, 25, 39, 57, 61, 65, 75, 95, 183, 195, 247, 285, 305, 325, 361, 475, 741, 793, 915, 975, 1083, 1159, 1235, 1425, 1525, 1805, 2379, 3477, 3705, 3965, 4575, 4693, 5415, 5795, 6175, 9025, 11895, 14079, 15067, 17385, 18525, 19825, 22021, 23465, 27075, 28975, 45201, 59475, 66063, 70395, 75335, 86925, 110105, 117325, 226005, 286273, 330315, 351975, 376675, 550525, 858819, 1130025, 1431365, 1651575, 4294095, 7156825, 21470475]

約数ペア:

[(1, 21470475), (3, 7156825), (5, 4294095), (13, 1651575), (15, 1431365), (19, 1130025), (25, 858819), (39, 550525), (57, 376675), (61, 351975), (65, 330315), (75, 286273), (95, 226005), (183, 117325), (195, 110105), (247, 86925), (285, 75335), (305, 70395), (325, 66063), (361, 59475), (475, 45201), (741, 28975), (793, 27075), (915, 23465), (975, 22021), (1083, 19825), (1159, 18525), (1235, 17385), (1425, 15067), (1525, 14079), (1805, 11895), (2379, 9025), (3477, 6175), (3705, 5795), (3965, 5415), (4575, 4693)]