21215970

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{653}}^1$

素因数の和:704

約数の個数: 72

約数和(自身を含む): 58306716

約数和(自身を除く): 37090746

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 19, 30, 38, 45, 57, 90, 95, 114, 171, 190, 285, 342, 361, 570, 653, 722, 855, 1083, 1306, 1710, 1805, 1959, 2166, 3249, 3265, 3610, 3918, 5415, 5877, 6498, 6530, 9795, 10830, 11754, 12407, 16245, 19590, 24814, 29385, 32490, 37221, 58770, 62035, 74442, 111663, 124070, 186105, 223326, 235733, 372210, 471466, 558315, 707199, 1116630, 1178665, 1414398, 2121597, 2357330, 3535995, 4243194, 7071990, 10607985, 21215970]

約数ペア:

[(1, 21215970), (2, 10607985), (3, 7071990), (5, 4243194), (6, 3535995), (9, 2357330), (10, 2121597), (15, 1414398), (18, 1178665), (19, 1116630), (30, 707199), (38, 558315), (45, 471466), (57, 372210), (90, 235733), (95, 223326), (114, 186105), (171, 124070), (190, 111663), (285, 74442), (342, 62035), (361, 58770), (570, 37221), (653, 32490), (722, 29385), (855, 24814), (1083, 19590), (1306, 16245), (1710, 12407), (1805, 11754), (1959, 10830), (2166, 9795), (3249, 6530), (3265, 6498), (3610, 5877), (3918, 5415)]