21291780

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{19}}^2\times {\mathrm{983}}^1$

素因数の和:1033

約数の個数: 72

約数和(自身を含む): 62983872

約数和(自身を除く): 41692092

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 19, 20, 30, 38, 57, 60, 76, 95, 114, 190, 228, 285, 361, 380, 570, 722, 983, 1083, 1140, 1444, 1805, 1966, 2166, 2949, 3610, 3932, 4332, 4915, 5415, 5898, 7220, 9830, 10830, 11796, 14745, 18677, 19660, 21660, 29490, 37354, 56031, 58980, 74708, 93385, 112062, 186770, 224124, 280155, 354863, 373540, 560310, 709726, 1064589, 1120620, 1419452, 1774315, 2129178, 3548630, 4258356, 5322945, 7097260, 10645890, 21291780]

約数ペア:

[(1, 21291780), (2, 10645890), (3, 7097260), (4, 5322945), (5, 4258356), (6, 3548630), (10, 2129178), (12, 1774315), (15, 1419452), (19, 1120620), (20, 1064589), (30, 709726), (38, 560310), (57, 373540), (60, 354863), (76, 280155), (95, 224124), (114, 186770), (190, 112062), (228, 93385), (285, 74708), (361, 58980), (380, 56031), (570, 37354), (722, 29490), (983, 21660), (1083, 19660), (1140, 18677), (1444, 14745), (1805, 11796), (1966, 10830), (2166, 9830), (2949, 7220), (3610, 5898), (3932, 5415), (4332, 4915)]