21437970

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{97}}^1\times {\mathrm{139}}^1$

素因数の和:299

約数の個数: 64

約数和(自身を含む): 53343360

約数和(自身を除く): 31905390

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 53, 97, 106, 139, 159, 194, 265, 278, 291, 318, 417, 485, 530, 582, 695, 795, 834, 970, 1390, 1455, 1590, 2085, 2910, 4170, 5141, 7367, 10282, 13483, 14734, 15423, 22101, 25705, 26966, 30846, 36835, 40449, 44202, 51410, 67415, 73670, 77115, 80898, 110505, 134830, 154230, 202245, 221010, 404490, 714599, 1429198, 2143797, 3572995, 4287594, 7145990, 10718985, 21437970]

約数ペア:

[(1, 21437970), (2, 10718985), (3, 7145990), (5, 4287594), (6, 3572995), (10, 2143797), (15, 1429198), (30, 714599), (53, 404490), (97, 221010), (106, 202245), (139, 154230), (159, 134830), (194, 110505), (265, 80898), (278, 77115), (291, 73670), (318, 67415), (417, 51410), (485, 44202), (530, 40449), (582, 36835), (695, 30846), (795, 26966), (834, 25705), (970, 22101), (1390, 15423), (1455, 14734), (1590, 13483), (2085, 10282), (2910, 7367), (4170, 5141)]