81703420

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{211}}^1\times {\mathrm{1019}}^1$

素因数の和:1258

約数の個数: 48

約数和(自身を含む): 181641600

約数和(自身を除く): 99938180

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 211, 380, 422, 844, 1019, 1055, 2038, 2110, 4009, 4076, 4220, 5095, 8018, 10190, 16036, 19361, 20045, 20380, 38722, 40090, 77444, 80180, 96805, 193610, 215009, 387220, 430018, 860036, 1075045, 2150090, 4085171, 4300180, 8170342, 16340684, 20425855, 40851710, 81703420]

約数ペア:

[(1, 81703420), (2, 40851710), (4, 20425855), (5, 16340684), (10, 8170342), (19, 4300180), (20, 4085171), (38, 2150090), (76, 1075045), (95, 860036), (190, 430018), (211, 387220), (380, 215009), (422, 193610), (844, 96805), (1019, 80180), (1055, 77444), (2038, 40090), (2110, 38722), (4009, 20380), (4076, 20045), (4220, 19361), (5095, 16036), (8018, 10190)]