128581778

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{251}}^1$

素因数の和:363

約数の個数: 64

約数和(自身を含む): 236234880

約数和(自身を除く): 107653102

約数列:

[1, 2, 13, 17, 19, 26, 34, 38, 61, 122, 221, 247, 251, 323, 442, 494, 502, 646, 793, 1037, 1159, 1586, 2074, 2318, 3263, 4199, 4267, 4769, 6526, 8398, 8534, 9538, 13481, 15067, 15311, 19703, 26962, 30134, 30622, 39406, 55471, 61997, 81073, 110942, 123994, 162146, 199043, 256139, 260287, 290909, 398086, 512278, 520574, 581818, 1053949, 2107898, 3383731, 3781817, 4945453, 6767462, 7563634, 9890906, 64290889, 128581778]

約数ペア:

[(1, 128581778), (2, 64290889), (13, 9890906), (17, 7563634), (19, 6767462), (26, 4945453), (34, 3781817), (38, 3383731), (61, 2107898), (122, 1053949), (221, 581818), (247, 520574), (251, 512278), (323, 398086), (442, 290909), (494, 260287), (502, 256139), (646, 199043), (793, 162146), (1037, 123994), (1159, 110942), (1586, 81073), (2074, 61997), (2318, 55471), (3263, 39406), (4199, 30622), (4267, 30134), (4769, 26962), (6526, 19703), (8398, 15311), (8534, 15067), (9538, 13481)]