21661020

素因数分解:

$2^2\times 3^5\times 5^1\times {\mathrm{4457}}^1$

素因数の和:4481

約数の個数: 72

約数和(自身を含む): 68153904

約数和(自身を除く): 46492884

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 81, 90, 108, 135, 162, 180, 243, 270, 324, 405, 486, 540, 810, 972, 1215, 1620, 2430, 4457, 4860, 8914, 13371, 17828, 22285, 26742, 40113, 44570, 53484, 66855, 80226, 89140, 120339, 133710, 160452, 200565, 240678, 267420, 361017, 401130, 481356, 601695, 722034, 802260, 1083051, 1203390, 1444068, 1805085, 2166102, 2406780, 3610170, 4332204, 5415255, 7220340, 10830510, 21661020]

約数ペア:

[(1, 21661020), (2, 10830510), (3, 7220340), (4, 5415255), (5, 4332204), (6, 3610170), (9, 2406780), (10, 2166102), (12, 1805085), (15, 1444068), (18, 1203390), (20, 1083051), (27, 802260), (30, 722034), (36, 601695), (45, 481356), (54, 401130), (60, 361017), (81, 267420), (90, 240678), (108, 200565), (135, 160452), (162, 133710), (180, 120339), (243, 89140), (270, 80226), (324, 66855), (405, 53484), (486, 44570), (540, 40113), (810, 26742), (972, 22285), (1215, 17828), (1620, 13371), (2430, 8914), (4457, 4860)]