20871880

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{947}}^1$

素因数の和:1006

約数の個数: 64

約数和(自身を含む): 51192000

約数和(自身を除く): 30320120

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 29, 38, 40, 58, 76, 95, 116, 145, 152, 190, 232, 290, 380, 551, 580, 760, 947, 1102, 1160, 1894, 2204, 2755, 3788, 4408, 4735, 5510, 7576, 9470, 11020, 17993, 18940, 22040, 27463, 35986, 37880, 54926, 71972, 89965, 109852, 137315, 143944, 179930, 219704, 274630, 359860, 521797, 549260, 719720, 1043594, 1098520, 2087188, 2608985, 4174376, 5217970, 10435940, 20871880]

約数ペア:

[(1, 20871880), (2, 10435940), (4, 5217970), (5, 4174376), (8, 2608985), (10, 2087188), (19, 1098520), (20, 1043594), (29, 719720), (38, 549260), (40, 521797), (58, 359860), (76, 274630), (95, 219704), (116, 179930), (145, 143944), (152, 137315), (190, 109852), (232, 89965), (290, 71972), (380, 54926), (551, 37880), (580, 35986), (760, 27463), (947, 22040), (1102, 18940), (1160, 17993), (1894, 11020), (2204, 9470), (2755, 7576), (3788, 5510), (4408, 4735)]