21840500

素因数分解:

$2^2\times 5^3\times {\mathrm{11}}^2\times {\mathrm{19}}^2$

素因数の和:79

約数の個数: 108

約数和(自身を含む): 55334916

約数和(自身を除く): 33494416

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 25, 38, 44, 50, 55, 76, 95, 100, 110, 121, 125, 190, 209, 220, 242, 250, 275, 361, 380, 418, 475, 484, 500, 550, 605, 722, 836, 950, 1045, 1100, 1210, 1375, 1444, 1805, 1900, 2090, 2299, 2375, 2420, 2750, 3025, 3610, 3971, 4180, 4598, 4750, 5225, 5500, 6050, 7220, 7942, 9025, 9196, 9500, 10450, 11495, 12100, 15125, 15884, 18050, 19855, 20900, 22990, 26125, 30250, 36100, 39710, 43681, 45125, 45980, 52250, 57475, 60500, 79420, 87362, 90250, 99275, 104500, 114950, 174724, 180500, 198550, 218405, 229900, 287375, 397100, 436810, 496375, 574750, 873620, 992750, 1092025, 1149500, 1985500, 2184050, 4368100, 5460125, 10920250, 21840500]

約数ペア:

[(1, 21840500), (2, 10920250), (4, 5460125), (5, 4368100), (10, 2184050), (11, 1985500), (19, 1149500), (20, 1092025), (22, 992750), (25, 873620), (38, 574750), (44, 496375), (50, 436810), (55, 397100), (76, 287375), (95, 229900), (100, 218405), (110, 198550), (121, 180500), (125, 174724), (190, 114950), (209, 104500), (220, 99275), (242, 90250), (250, 87362), (275, 79420), (361, 60500), (380, 57475), (418, 52250), (475, 45980), (484, 45125), (500, 43681), (550, 39710), (605, 36100), (722, 30250), (836, 26125), (950, 22990), (1045, 20900), (1100, 19855), (1210, 18050), (1375, 15884), (1444, 15125), (1805, 12100), (1900, 11495), (2090, 10450), (2299, 9500), (2375, 9196), (2420, 9025), (2750, 7942), (3025, 7220), (3610, 6050), (3971, 5500), (4180, 5225), (4598, 4750)]