21062925

素因数分解:

$3^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{379}}^1$

素因数の和:427

約数の個数: 72

約数和(自身を含む): 42879200

約数和(自身を除く): 21816275

約数列:

[1, 3, 5, 9, 13, 15, 19, 25, 39, 45, 57, 65, 75, 95, 117, 171, 195, 225, 247, 285, 325, 379, 475, 585, 741, 855, 975, 1137, 1235, 1425, 1895, 2223, 2925, 3411, 3705, 4275, 4927, 5685, 6175, 7201, 9475, 11115, 14781, 17055, 18525, 21603, 24635, 28425, 36005, 44343, 55575, 64809, 73905, 85275, 93613, 108015, 123175, 180025, 221715, 280839, 324045, 369525, 468065, 540075, 842517, 1108575, 1404195, 1620225, 2340325, 4212585, 7020975, 21062925]

約数ペア:

[(1, 21062925), (3, 7020975), (5, 4212585), (9, 2340325), (13, 1620225), (15, 1404195), (19, 1108575), (25, 842517), (39, 540075), (45, 468065), (57, 369525), (65, 324045), (75, 280839), (95, 221715), (117, 180025), (171, 123175), (195, 108015), (225, 93613), (247, 85275), (285, 73905), (325, 64809), (379, 55575), (475, 44343), (585, 36005), (741, 28425), (855, 24635), (975, 21603), (1137, 18525), (1235, 17055), (1425, 14781), (1895, 11115), (2223, 9475), (2925, 7201), (3411, 6175), (3705, 5685), (4275, 4927)]