21640970

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{2729}}^1$

素因数の和:2810

約数の個数: 32

約数和(自身を含む): 42653520

約数和(自身を除く): 21012550

約数列:

[1, 2, 5, 10, 13, 26, 61, 65, 122, 130, 305, 610, 793, 1586, 2729, 3965, 5458, 7930, 13645, 27290, 35477, 70954, 166469, 177385, 332938, 354770, 832345, 1664690, 2164097, 4328194, 10820485, 21640970]

約数ペア:

[(1, 21640970), (2, 10820485), (5, 4328194), (10, 2164097), (13, 1664690), (26, 832345), (61, 354770), (65, 332938), (122, 177385), (130, 166469), (305, 70954), (610, 35477), (793, 27290), (1586, 13645), (2729, 7930), (3965, 5458)]