21273440

素因数分解:

$2^5\times 5^1\times {\mathrm{31}}^1\times {\mathrm{4289}}^1$

素因数の和:4335

約数の個数: 48

約数和(自身を含む): 51891840

約数和(自身を除く): 30618400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 80, 124, 155, 160, 248, 310, 496, 620, 992, 1240, 2480, 4289, 4960, 8578, 17156, 21445, 34312, 42890, 68624, 85780, 132959, 137248, 171560, 265918, 343120, 531836, 664795, 686240, 1063672, 1329590, 2127344, 2659180, 4254688, 5318360, 10636720, 21273440]

約数ペア:

[(1, 21273440), (2, 10636720), (4, 5318360), (5, 4254688), (8, 2659180), (10, 2127344), (16, 1329590), (20, 1063672), (31, 686240), (32, 664795), (40, 531836), (62, 343120), (80, 265918), (124, 171560), (155, 137248), (160, 132959), (248, 85780), (310, 68624), (496, 42890), (620, 34312), (992, 21445), (1240, 17156), (2480, 8578), (4289, 4960)]