21397914

素因数分解:

$2^1\times 3^2\times {\mathrm{19}}^2\times {\mathrm{37}}^1\times {\mathrm{89}}^1$

素因数の和:172

約数の個数: 72

約数和(自身を含む): 50817780

約数和(自身を除く): 29419866

約数列:

[1, 2, 3, 6, 9, 18, 19, 37, 38, 57, 74, 89, 111, 114, 171, 178, 222, 267, 333, 342, 361, 534, 666, 703, 722, 801, 1083, 1406, 1602, 1691, 2109, 2166, 3249, 3293, 3382, 4218, 5073, 6327, 6498, 6586, 9879, 10146, 12654, 13357, 15219, 19758, 26714, 29637, 30438, 32129, 40071, 59274, 62567, 64258, 80142, 96387, 120213, 125134, 187701, 192774, 240426, 289161, 375402, 563103, 578322, 1126206, 1188773, 2377546, 3566319, 7132638, 10698957, 21397914]

約数ペア:

[(1, 21397914), (2, 10698957), (3, 7132638), (6, 3566319), (9, 2377546), (18, 1188773), (19, 1126206), (37, 578322), (38, 563103), (57, 375402), (74, 289161), (89, 240426), (111, 192774), (114, 187701), (171, 125134), (178, 120213), (222, 96387), (267, 80142), (333, 64258), (342, 62567), (361, 59274), (534, 40071), (666, 32129), (703, 30438), (722, 29637), (801, 26714), (1083, 19758), (1406, 15219), (1602, 13357), (1691, 12654), (2109, 10146), (2166, 9879), (3249, 6586), (3293, 6498), (3382, 6327), (4218, 5073)]