21017950

素因数分解:

$2^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{313}}^1$

素因数の和:421

約数の個数: 48

約数和(自身を含む): 42050880

約数和(自身を除く): 21032930

約数列:

[1, 2, 5, 10, 17, 25, 34, 50, 79, 85, 158, 170, 313, 395, 425, 626, 790, 850, 1343, 1565, 1975, 2686, 3130, 3950, 5321, 6715, 7825, 10642, 13430, 15650, 24727, 26605, 33575, 49454, 53210, 67150, 123635, 133025, 247270, 266050, 420359, 618175, 840718, 1236350, 2101795, 4203590, 10508975, 21017950]

約数ペア:

[(1, 21017950), (2, 10508975), (5, 4203590), (10, 2101795), (17, 1236350), (25, 840718), (34, 618175), (50, 420359), (79, 266050), (85, 247270), (158, 133025), (170, 123635), (313, 67150), (395, 53210), (425, 49454), (626, 33575), (790, 26605), (850, 24727), (1343, 15650), (1565, 13430), (1975, 10642), (2686, 7825), (3130, 6715), (3950, 5321)]