28720860

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{9769}}^1$

素因数の和:9795

約数の個数: 72

約数和(自身を含む): 93557520

約数和(自身を除く): 64836660

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, 9769, 19538, 29307, 39076, 48845, 58614, 68383, 97690, 117228, 136766, 146535, 195380, 205149, 273532, 293070, 341915, 410298, 478681, 586140, 683830, 820596, 957362, 1025745, 1367660, 1436043, 1914724, 2051490, 2393405, 2872086, 4102980, 4786810, 5744172, 7180215, 9573620, 14360430, 28720860]

約数ペア:

[(1, 28720860), (2, 14360430), (3, 9573620), (4, 7180215), (5, 5744172), (6, 4786810), (7, 4102980), (10, 2872086), (12, 2393405), (14, 2051490), (15, 1914724), (20, 1436043), (21, 1367660), (28, 1025745), (30, 957362), (35, 820596), (42, 683830), (49, 586140), (60, 478681), (70, 410298), (84, 341915), (98, 293070), (105, 273532), (140, 205149), (147, 195380), (196, 146535), (210, 136766), (245, 117228), (294, 97690), (420, 68383), (490, 58614), (588, 48845), (735, 39076), (980, 29307), (1470, 19538), (2940, 9769)]