21501825

素因数分解:

$3^1\times 5^2\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{191}}^1$

素因数の和:302

約数の個数: 48

約数和(自身を含む): 38092800

約数和(自身を除く): 16590975

約数列:

[1, 3, 5, 15, 19, 25, 57, 75, 79, 95, 191, 237, 285, 395, 475, 573, 955, 1185, 1425, 1501, 1975, 2865, 3629, 4503, 4775, 5925, 7505, 10887, 14325, 15089, 18145, 22515, 37525, 45267, 54435, 75445, 90725, 112575, 226335, 272175, 286691, 377225, 860073, 1131675, 1433455, 4300365, 7167275, 21501825]

約数ペア:

[(1, 21501825), (3, 7167275), (5, 4300365), (15, 1433455), (19, 1131675), (25, 860073), (57, 377225), (75, 286691), (79, 272175), (95, 226335), (191, 112575), (237, 90725), (285, 75445), (395, 54435), (475, 45267), (573, 37525), (955, 22515), (1185, 18145), (1425, 15089), (1501, 14325), (1975, 10887), (2865, 7505), (3629, 5925), (4503, 4775)]