21053786

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{109}}^1$

素因数の和:183

約数の個数: 64

約数和(自身を含む): 39916800

約数和(自身を除く): 18863014

約数列:

[1, 2, 13, 17, 19, 23, 26, 34, 38, 46, 109, 218, 221, 247, 299, 323, 391, 437, 442, 494, 598, 646, 782, 874, 1417, 1853, 2071, 2507, 2834, 3706, 4142, 4199, 5014, 5083, 5681, 7429, 8398, 10166, 11362, 14858, 24089, 26923, 32591, 35207, 42619, 47633, 48178, 53846, 65182, 70414, 85238, 95266, 96577, 193154, 457691, 554047, 619229, 809761, 915382, 1108094, 1238458, 1619522, 10526893, 21053786]

約数ペア:

[(1, 21053786), (2, 10526893), (13, 1619522), (17, 1238458), (19, 1108094), (23, 915382), (26, 809761), (34, 619229), (38, 554047), (46, 457691), (109, 193154), (218, 96577), (221, 95266), (247, 85238), (299, 70414), (323, 65182), (391, 53846), (437, 48178), (442, 47633), (494, 42619), (598, 35207), (646, 32591), (782, 26923), (874, 24089), (1417, 14858), (1853, 11362), (2071, 10166), (2507, 8398), (2834, 7429), (3706, 5681), (4142, 5083), (4199, 5014)]