20522000

素因数分解:

$2^4\times 5^3\times {\mathrm{31}}^1\times {\mathrm{331}}^1$

素因数の和:385

約数の個数: 80

約数和(自身を含む): 51377664

約数和(自身を除く): 30855664

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 31, 40, 50, 62, 80, 100, 124, 125, 155, 200, 248, 250, 310, 331, 400, 496, 500, 620, 662, 775, 1000, 1240, 1324, 1550, 1655, 2000, 2480, 2648, 3100, 3310, 3875, 5296, 6200, 6620, 7750, 8275, 10261, 12400, 13240, 15500, 16550, 20522, 26480, 31000, 33100, 41044, 41375, 51305, 62000, 66200, 82088, 82750, 102610, 132400, 164176, 165500, 205220, 256525, 331000, 410440, 513050, 662000, 820880, 1026100, 1282625, 2052200, 2565250, 4104400, 5130500, 10261000, 20522000]

約数ペア:

[(1, 20522000), (2, 10261000), (4, 5130500), (5, 4104400), (8, 2565250), (10, 2052200), (16, 1282625), (20, 1026100), (25, 820880), (31, 662000), (40, 513050), (50, 410440), (62, 331000), (80, 256525), (100, 205220), (124, 165500), (125, 164176), (155, 132400), (200, 102610), (248, 82750), (250, 82088), (310, 66200), (331, 62000), (400, 51305), (496, 41375), (500, 41044), (620, 33100), (662, 31000), (775, 26480), (1000, 20522), (1240, 16550), (1324, 15500), (1550, 13240), (1655, 12400), (2000, 10261), (2480, 8275), (2648, 7750), (3100, 6620), (3310, 6200), (3875, 5296)]