21120030

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{3847}}^1$

素因数の和:3921

約数の個数: 48

約数和(自身を含む): 55826784

約数和(自身を除く): 34706754

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 61, 90, 122, 183, 305, 366, 549, 610, 915, 1098, 1830, 2745, 3847, 5490, 7694, 11541, 19235, 23082, 34623, 38470, 57705, 69246, 115410, 173115, 234667, 346230, 469334, 704001, 1173335, 1408002, 2112003, 2346670, 3520005, 4224006, 7040010, 10560015, 21120030]

約数ペア:

[(1, 21120030), (2, 10560015), (3, 7040010), (5, 4224006), (6, 3520005), (9, 2346670), (10, 2112003), (15, 1408002), (18, 1173335), (30, 704001), (45, 469334), (61, 346230), (90, 234667), (122, 173115), (183, 115410), (305, 69246), (366, 57705), (549, 38470), (610, 34623), (915, 23082), (1098, 19235), (1830, 11541), (2745, 7694), (3847, 5490)]