20191000

素因数分解:

$2^3\times 5^3\times {\mathrm{61}}^1\times {\mathrm{331}}^1$

素因数の和:413

約数の個数: 64

約数和(自身を含む): 48166560

約数和(自身を除く): 27975560

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 61, 100, 122, 125, 200, 244, 250, 305, 331, 488, 500, 610, 662, 1000, 1220, 1324, 1525, 1655, 2440, 2648, 3050, 3310, 6100, 6620, 7625, 8275, 12200, 13240, 15250, 16550, 20191, 30500, 33100, 40382, 41375, 61000, 66200, 80764, 82750, 100955, 161528, 165500, 201910, 331000, 403820, 504775, 807640, 1009550, 2019100, 2523875, 4038200, 5047750, 10095500, 20191000]

約数ペア:

[(1, 20191000), (2, 10095500), (4, 5047750), (5, 4038200), (8, 2523875), (10, 2019100), (20, 1009550), (25, 807640), (40, 504775), (50, 403820), (61, 331000), (100, 201910), (122, 165500), (125, 161528), (200, 100955), (244, 82750), (250, 80764), (305, 66200), (331, 61000), (488, 41375), (500, 40382), (610, 33100), (662, 30500), (1000, 20191), (1220, 16550), (1324, 15250), (1525, 13240), (1655, 12200), (2440, 8275), (2648, 7625), (3050, 6620), (3310, 6100)]