21022245

素因数分解:

$3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{181}}^1$

素因数の和:310

約数の個数: 48

約数和(自身を含む): 38329200

約数和(自身を除く): 17306955

約数列:

[1, 3, 5, 9, 15, 29, 45, 87, 89, 145, 181, 261, 267, 435, 445, 543, 801, 905, 1305, 1335, 1629, 2581, 2715, 4005, 5249, 7743, 8145, 12905, 15747, 16109, 23229, 26245, 38715, 47241, 48327, 78735, 80545, 116145, 144981, 236205, 241635, 467161, 724905, 1401483, 2335805, 4204449, 7007415, 21022245]

約数ペア:

[(1, 21022245), (3, 7007415), (5, 4204449), (9, 2335805), (15, 1401483), (29, 724905), (45, 467161), (87, 241635), (89, 236205), (145, 144981), (181, 116145), (261, 80545), (267, 78735), (435, 48327), (445, 47241), (543, 38715), (801, 26245), (905, 23229), (1305, 16109), (1335, 15747), (1629, 12905), (2581, 8145), (2715, 7743), (4005, 5249)]