26787220

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{101}}^1\times {\mathrm{149}}^1$

素因数の和:348

約数の個数: 48

約数和(自身を含む): 57834000

約数和(自身を除く): 31046780

約数列:

[1, 2, 4, 5, 10, 20, 89, 101, 149, 178, 202, 298, 356, 404, 445, 505, 596, 745, 890, 1010, 1490, 1780, 2020, 2980, 8989, 13261, 15049, 17978, 26522, 30098, 35956, 44945, 53044, 60196, 66305, 75245, 89890, 132610, 150490, 179780, 265220, 300980, 1339361, 2678722, 5357444, 6696805, 13393610, 26787220]

約数ペア:

[(1, 26787220), (2, 13393610), (4, 6696805), (5, 5357444), (10, 2678722), (20, 1339361), (89, 300980), (101, 265220), (149, 179780), (178, 150490), (202, 132610), (298, 89890), (356, 75245), (404, 66305), (445, 60196), (505, 53044), (596, 44945), (745, 35956), (890, 30098), (1010, 26522), (1490, 17978), (1780, 15049), (2020, 13261), (2980, 8989)]