17921565

素因数分解:

$3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{443}}^1$

素因数の和:514

約数の個数: 48

約数和(自身を含む): 33246720

約数和(自身を除く): 15325155

約数列:

[1, 3, 5, 9, 15, 29, 31, 45, 87, 93, 145, 155, 261, 279, 435, 443, 465, 899, 1305, 1329, 1395, 2215, 2697, 3987, 4495, 6645, 8091, 12847, 13485, 13733, 19935, 38541, 40455, 41199, 64235, 68665, 115623, 123597, 192705, 205995, 398257, 578115, 617985, 1194771, 1991285, 3584313, 5973855, 17921565]

約数ペア:

[(1, 17921565), (3, 5973855), (5, 3584313), (9, 1991285), (15, 1194771), (29, 617985), (31, 578115), (45, 398257), (87, 205995), (93, 192705), (145, 123597), (155, 115623), (261, 68665), (279, 64235), (435, 41199), (443, 40455), (465, 38541), (899, 19935), (1305, 13733), (1329, 13485), (1395, 12847), (2215, 8091), (2697, 6645), (3987, 4495)]