21072425

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{109}}^1$

素因数の和:186

約数の個数: 48

約数和(自身を含む): 31099200

約数和(自身を除く): 10026775

約数列:

[1, 5, 11, 19, 25, 37, 55, 95, 109, 185, 209, 275, 407, 475, 545, 703, 925, 1045, 1199, 2035, 2071, 2725, 3515, 4033, 5225, 5995, 7733, 10175, 10355, 17575, 20165, 22781, 29975, 38665, 44363, 51775, 76627, 100825, 113905, 193325, 221815, 383135, 569525, 842897, 1109075, 1915675, 4214485, 21072425]

約数ペア:

[(1, 21072425), (5, 4214485), (11, 1915675), (19, 1109075), (25, 842897), (37, 569525), (55, 383135), (95, 221815), (109, 193325), (185, 113905), (209, 100825), (275, 76627), (407, 51775), (475, 44363), (545, 38665), (703, 29975), (925, 22781), (1045, 20165), (1199, 17575), (2035, 10355), (2071, 10175), (2725, 7733), (3515, 5995), (4033, 5225)]