21259935

素因数分解:

$3^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{167}}^1$

素因数の和:245

約数の個数: 64

約数和(自身を含む): 40642560

約数和(自身を除く): 19382625

約数列:

[1, 3, 5, 9, 15, 23, 27, 41, 45, 69, 115, 123, 135, 167, 205, 207, 345, 369, 501, 615, 621, 835, 943, 1035, 1107, 1503, 1845, 2505, 2829, 3105, 3841, 4509, 4715, 5535, 6847, 7515, 8487, 11523, 14145, 19205, 20541, 22545, 25461, 34235, 34569, 42435, 57615, 61623, 102705, 103707, 127305, 157481, 172845, 184869, 308115, 472443, 518535, 787405, 924345, 1417329, 2362215, 4251987, 7086645, 21259935]

約数ペア:

[(1, 21259935), (3, 7086645), (5, 4251987), (9, 2362215), (15, 1417329), (23, 924345), (27, 787405), (41, 518535), (45, 472443), (69, 308115), (115, 184869), (123, 172845), (135, 157481), (167, 127305), (205, 103707), (207, 102705), (345, 61623), (369, 57615), (501, 42435), (615, 34569), (621, 34235), (835, 25461), (943, 22545), (1035, 20541), (1107, 19205), (1503, 14145), (1845, 11523), (2505, 8487), (2829, 7515), (3105, 6847), (3841, 5535), (4509, 4715)]