20011120

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8069}}^1$

素因数の和:8113

約数の個数: 40

約数和(自身を含む): 48032640

約数和(自身を除く): 28021520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 8069, 16138, 32276, 40345, 64552, 80690, 129104, 161380, 250139, 322760, 500278, 645520, 1000556, 1250695, 2001112, 2501390, 4002224, 5002780, 10005560, 20011120]

約数ペア:

[(1, 20011120), (2, 10005560), (4, 5002780), (5, 4002224), (8, 2501390), (10, 2001112), (16, 1250695), (20, 1000556), (31, 645520), (40, 500278), (62, 322760), (80, 250139), (124, 161380), (155, 129104), (248, 80690), (310, 64552), (496, 40345), (620, 32276), (1240, 16138), (2480, 8069)]