20787525

素因数分解:

$3^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{227}}^1$

素因数の和:291

約数の個数: 72

約数和(自身を含む): 41899104

約数和(自身を除く): 21111579

約数列:

[1, 3, 5, 9, 11, 15, 25, 33, 37, 45, 55, 75, 99, 111, 165, 185, 225, 227, 275, 333, 407, 495, 555, 681, 825, 925, 1135, 1221, 1665, 2035, 2043, 2475, 2497, 2775, 3405, 3663, 5675, 6105, 7491, 8325, 8399, 10175, 10215, 12485, 17025, 18315, 22473, 25197, 30525, 37455, 41995, 51075, 62425, 75591, 91575, 92389, 112365, 125985, 187275, 209975, 277167, 377955, 461945, 561825, 629925, 831501, 1385835, 1889775, 2309725, 4157505, 6929175, 20787525]

約数ペア:

[(1, 20787525), (3, 6929175), (5, 4157505), (9, 2309725), (11, 1889775), (15, 1385835), (25, 831501), (33, 629925), (37, 561825), (45, 461945), (55, 377955), (75, 277167), (99, 209975), (111, 187275), (165, 125985), (185, 112365), (225, 92389), (227, 91575), (275, 75591), (333, 62425), (407, 51075), (495, 41995), (555, 37455), (681, 30525), (825, 25197), (925, 22473), (1135, 18315), (1221, 17025), (1665, 12485), (2035, 10215), (2043, 10175), (2475, 8399), (2497, 8325), (2775, 7491), (3405, 6105), (3663, 5675)]