21198205

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{127}}^1\times {\mathrm{251}}^1$

素因数の和:409

約数の個数: 32

約数和(自身を含む): 30965760

約数和(自身を除く): 9767555

約数列:

[1, 5, 7, 19, 35, 95, 127, 133, 251, 635, 665, 889, 1255, 1757, 2413, 4445, 4769, 8785, 12065, 16891, 23845, 31877, 33383, 84455, 159385, 166915, 223139, 605663, 1115695, 3028315, 4239641, 21198205]

約数ペア:

[(1, 21198205), (5, 4239641), (7, 3028315), (19, 1115695), (35, 605663), (95, 223139), (127, 166915), (133, 159385), (251, 84455), (635, 33383), (665, 31877), (889, 23845), (1255, 16891), (1757, 12065), (2413, 8785), (4445, 4769)]