19875975

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{17}}^2\times {\mathrm{131}}^1$

素因数の和:185

約数の個数: 72

約数和(自身を含む): 40199808

約数和(自身を除く): 20323833

約数列:

[1, 3, 5, 7, 15, 17, 21, 25, 35, 51, 75, 85, 105, 119, 131, 175, 255, 289, 357, 393, 425, 525, 595, 655, 867, 917, 1275, 1445, 1785, 1965, 2023, 2227, 2751, 2975, 3275, 4335, 4585, 6069, 6681, 7225, 8925, 9825, 10115, 11135, 13755, 15589, 21675, 22925, 30345, 33405, 37859, 46767, 50575, 55675, 68775, 77945, 113577, 151725, 167025, 189295, 233835, 265013, 389725, 567885, 795039, 946475, 1169175, 1325065, 2839425, 3975195, 6625325, 19875975]

約数ペア:

[(1, 19875975), (3, 6625325), (5, 3975195), (7, 2839425), (15, 1325065), (17, 1169175), (21, 946475), (25, 795039), (35, 567885), (51, 389725), (75, 265013), (85, 233835), (105, 189295), (119, 167025), (131, 151725), (175, 113577), (255, 77945), (289, 68775), (357, 55675), (393, 50575), (425, 46767), (525, 37859), (595, 33405), (655, 30345), (867, 22925), (917, 21675), (1275, 15589), (1445, 13755), (1785, 11135), (1965, 10115), (2023, 9825), (2227, 8925), (2751, 7225), (2975, 6681), (3275, 6069), (4335, 4585)]