21121740

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{271}}^1\times {\mathrm{433}}^1$

素因数の和:719

約数の個数: 72

約数和(自身を含む): 64454208

約数和(自身を除く): 43332468

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 271, 433, 542, 813, 866, 1084, 1299, 1355, 1626, 1732, 2165, 2439, 2598, 2710, 3252, 3897, 4065, 4330, 4878, 5196, 5420, 6495, 7794, 8130, 8660, 9756, 12195, 12990, 15588, 16260, 19485, 24390, 25980, 38970, 48780, 77940, 117343, 234686, 352029, 469372, 586715, 704058, 1056087, 1173430, 1408116, 1760145, 2112174, 2346860, 3520290, 4224348, 5280435, 7040580, 10560870, 21121740]

約数ペア:

[(1, 21121740), (2, 10560870), (3, 7040580), (4, 5280435), (5, 4224348), (6, 3520290), (9, 2346860), (10, 2112174), (12, 1760145), (15, 1408116), (18, 1173430), (20, 1056087), (30, 704058), (36, 586715), (45, 469372), (60, 352029), (90, 234686), (180, 117343), (271, 77940), (433, 48780), (542, 38970), (813, 25980), (866, 24390), (1084, 19485), (1299, 16260), (1355, 15588), (1626, 12990), (1732, 12195), (2165, 9756), (2439, 8660), (2598, 8130), (2710, 7794), (3252, 6495), (3897, 5420), (4065, 5196), (4330, 4878)]