21489228

素因数分解:

$2^2\times 3^2\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{353}}^1$

素因数の和:471

約数の個数: 72

約数和(自身を含む): 57985200

約数和(自身を除く): 36495972

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 19, 36, 38, 57, 76, 89, 114, 171, 178, 228, 267, 342, 353, 356, 534, 684, 706, 801, 1059, 1068, 1412, 1602, 1691, 2118, 3177, 3204, 3382, 4236, 5073, 6354, 6707, 6764, 10146, 12708, 13414, 15219, 20121, 20292, 26828, 30438, 31417, 40242, 60363, 60876, 62834, 80484, 94251, 120726, 125668, 188502, 241452, 282753, 377004, 565506, 596923, 1131012, 1193846, 1790769, 2387692, 3581538, 5372307, 7163076, 10744614, 21489228]

約数ペア:

[(1, 21489228), (2, 10744614), (3, 7163076), (4, 5372307), (6, 3581538), (9, 2387692), (12, 1790769), (18, 1193846), (19, 1131012), (36, 596923), (38, 565506), (57, 377004), (76, 282753), (89, 241452), (114, 188502), (171, 125668), (178, 120726), (228, 94251), (267, 80484), (342, 62834), (353, 60876), (356, 60363), (534, 40242), (684, 31417), (706, 30438), (801, 26828), (1059, 20292), (1068, 20121), (1412, 15219), (1602, 13414), (1691, 12708), (2118, 10146), (3177, 6764), (3204, 6707), (3382, 6354), (4236, 5073)]