28219940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{103}}^2$

素因数の和:241

約数の個数: 72

約数和(自身を含む): 71991360

約数和(自身を除く): 43771420

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 70, 76, 95, 103, 133, 140, 190, 206, 266, 380, 412, 515, 532, 665, 721, 1030, 1330, 1442, 1957, 2060, 2660, 2884, 3605, 3914, 7210, 7828, 9785, 10609, 13699, 14420, 19570, 21218, 27398, 39140, 42436, 53045, 54796, 68495, 74263, 106090, 136990, 148526, 201571, 212180, 273980, 297052, 371315, 403142, 742630, 806284, 1007855, 1410997, 1485260, 2015710, 2821994, 4031420, 5643988, 7054985, 14109970, 28219940]

約数ペア:

[(1, 28219940), (2, 14109970), (4, 7054985), (5, 5643988), (7, 4031420), (10, 2821994), (14, 2015710), (19, 1485260), (20, 1410997), (28, 1007855), (35, 806284), (38, 742630), (70, 403142), (76, 371315), (95, 297052), (103, 273980), (133, 212180), (140, 201571), (190, 148526), (206, 136990), (266, 106090), (380, 74263), (412, 68495), (515, 54796), (532, 53045), (665, 42436), (721, 39140), (1030, 27398), (1330, 21218), (1442, 19570), (1957, 14420), (2060, 13699), (2660, 10609), (2884, 9785), (3605, 7828), (3914, 7210)]