20847920

素因数分解:

$2^4\times 5^1\times {\mathrm{421}}^1\times {\mathrm{619}}^1$

素因数の和:1053

約数の個数: 40

約数和(自身を含む): 48665040

約数和(自身を除く): 27817120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 421, 619, 842, 1238, 1684, 2105, 2476, 3095, 3368, 4210, 4952, 6190, 6736, 8420, 9904, 12380, 16840, 24760, 33680, 49520, 260599, 521198, 1042396, 1302995, 2084792, 2605990, 4169584, 5211980, 10423960, 20847920]

約数ペア:

[(1, 20847920), (2, 10423960), (4, 5211980), (5, 4169584), (8, 2605990), (10, 2084792), (16, 1302995), (20, 1042396), (40, 521198), (80, 260599), (421, 49520), (619, 33680), (842, 24760), (1238, 16840), (1684, 12380), (2105, 9904), (2476, 8420), (3095, 6736), (3368, 6190), (4210, 4952)]