21294420

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{7243}}^1$

素因数の和:7269

約数の個数: 72

約数和(自身を含む): 69368544

約数和(自身を除く): 48074124

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 70, 84, 98, 105, 140, 147, 196, 210, 245, 294, 420, 490, 588, 735, 980, 1470, 2940, 7243, 14486, 21729, 28972, 36215, 43458, 50701, 72430, 86916, 101402, 108645, 144860, 152103, 202804, 217290, 253505, 304206, 354907, 434580, 507010, 608412, 709814, 760515, 1014020, 1064721, 1419628, 1521030, 1774535, 2129442, 3042060, 3549070, 4258884, 5323605, 7098140, 10647210, 21294420]

約数ペア:

[(1, 21294420), (2, 10647210), (3, 7098140), (4, 5323605), (5, 4258884), (6, 3549070), (7, 3042060), (10, 2129442), (12, 1774535), (14, 1521030), (15, 1419628), (20, 1064721), (21, 1014020), (28, 760515), (30, 709814), (35, 608412), (42, 507010), (49, 434580), (60, 354907), (70, 304206), (84, 253505), (98, 217290), (105, 202804), (140, 152103), (147, 144860), (196, 108645), (210, 101402), (245, 86916), (294, 72430), (420, 50701), (490, 43458), (588, 36215), (735, 28972), (980, 21729), (1470, 14486), (2940, 7243)]