21367970

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{211}}^1$

素因数の和:291

約数の個数: 64

約数和(自身を含む): 44876160

約数和(自身を除く): 23508190

約数列:

[1, 2, 5, 10, 13, 19, 26, 38, 41, 65, 82, 95, 130, 190, 205, 211, 247, 410, 422, 494, 533, 779, 1055, 1066, 1235, 1558, 2110, 2470, 2665, 2743, 3895, 4009, 5330, 5486, 7790, 8018, 8651, 10127, 13715, 17302, 20045, 20254, 27430, 40090, 43255, 50635, 52117, 86510, 101270, 104234, 112463, 164369, 224926, 260585, 328738, 521170, 562315, 821845, 1124630, 1643690, 2136797, 4273594, 10683985, 21367970]

約数ペア:

[(1, 21367970), (2, 10683985), (5, 4273594), (10, 2136797), (13, 1643690), (19, 1124630), (26, 821845), (38, 562315), (41, 521170), (65, 328738), (82, 260585), (95, 224926), (130, 164369), (190, 112463), (205, 104234), (211, 101270), (247, 86510), (410, 52117), (422, 50635), (494, 43255), (533, 40090), (779, 27430), (1055, 20254), (1066, 20045), (1235, 17302), (1558, 13715), (2110, 10127), (2470, 8651), (2665, 8018), (2743, 7790), (3895, 5486), (4009, 5330)]