21096915

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{223}}^1$

素因数の和:308

約数の個数: 64

約数和(自身を含む): 41803776

約数和(自身を除く): 20706861

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 51, 53, 85, 105, 119, 159, 223, 255, 265, 357, 371, 595, 669, 795, 901, 1113, 1115, 1561, 1785, 1855, 2703, 3345, 3791, 4505, 4683, 5565, 6307, 7805, 11373, 11819, 13515, 18921, 18955, 23415, 26537, 31535, 35457, 56865, 59095, 79611, 82733, 94605, 132685, 177285, 200923, 248199, 398055, 413665, 602769, 1004615, 1240995, 1406461, 3013845, 4219383, 7032305, 21096915]

約数ペア:

[(1, 21096915), (3, 7032305), (5, 4219383), (7, 3013845), (15, 1406461), (17, 1240995), (21, 1004615), (35, 602769), (51, 413665), (53, 398055), (85, 248199), (105, 200923), (119, 177285), (159, 132685), (223, 94605), (255, 82733), (265, 79611), (357, 59095), (371, 56865), (595, 35457), (669, 31535), (795, 26537), (901, 23415), (1113, 18955), (1115, 18921), (1561, 13515), (1785, 11819), (1855, 11373), (2703, 7805), (3345, 6307), (3791, 5565), (4505, 4683)]