21611940

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{7351}}^1$

素因数の和:7377

約数の個数: 72

約数和(自身を含む): 70402752

約数和(自身を除く): 48790812

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, 7351, 14702, 22053, 29404, 36755, 44106, 51457, 73510, 88212, 102914, 110265, 147020, 154371, 205828, 220530, 257285, 308742, 360199, 441060, 514570, 617484, 720398, 771855, 1029140, 1080597, 1440796, 1543710, 1800995, 2161194, 3087420, 3601990, 4322388, 5402985, 7203980, 10805970, 21611940]

約数ペア:

[(1, 21611940), (2, 10805970), (3, 7203980), (4, 5402985), (5, 4322388), (6, 3601990), (7, 3087420), (10, 2161194), (12, 1800995), (14, 1543710), (15, 1440796), (20, 1080597), (21, 1029140), (28, 771855), (30, 720398), (35, 617484), (42, 514570), (49, 441060), (60, 360199), (70, 308742), (84, 257285), (98, 220530), (105, 205828), (140, 154371), (147, 147020), (196, 110265), (210, 102914), (245, 88212), (294, 73510), (420, 51457), (490, 44106), (588, 36755), (735, 29404), (980, 22053), (1470, 14702), (2940, 7351)]