21620175

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{547}}^1$

素因数の和:608

約数の個数: 48

約数和(自身を含む): 39140352

約数和(自身を除く): 17520177

約数列:

[1, 3, 5, 15, 17, 25, 31, 51, 75, 85, 93, 155, 255, 425, 465, 527, 547, 775, 1275, 1581, 1641, 2325, 2635, 2735, 7905, 8205, 9299, 13175, 13675, 16957, 27897, 39525, 41025, 46495, 50871, 84785, 139485, 232475, 254355, 288269, 423925, 697425, 864807, 1271775, 1441345, 4324035, 7206725, 21620175]

約数ペア:

[(1, 21620175), (3, 7206725), (5, 4324035), (15, 1441345), (17, 1271775), (25, 864807), (31, 697425), (51, 423925), (75, 288269), (85, 254355), (93, 232475), (155, 139485), (255, 84785), (425, 50871), (465, 46495), (527, 41025), (547, 39525), (775, 27897), (1275, 16957), (1581, 13675), (1641, 13175), (2325, 9299), (2635, 8205), (2735, 7905)]